World Teacher – Other World Style Education & Agent (WN)


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A man who was once called the world’s strongest agent ended up becoming a teacher after his retirement, to train a new generation of agents. After many years of training his disciples, he was killed at the age of 60 by a secret organization’s ruse and was reincarnated in another world with his memories intact. Though he was surprised by the existence of magic and the strange species in that world, he quickly adapted to his condition as a newborn and took advantage of it. He acquired special magic and gained a massive amount of strength thanks to his rigorous discipline, in order to reach his goal: Resume his career as a teacher which he left halfway through in his previous life.

This is the story of a man, who, based on the memories and the experiences of his previous life, became a teacher who travels through the world with his students.

Associated Names
One entry per line
ワールド・ティーチャー -異世界式教育エージェント-
Related Series
World Teacher – Other World Style Education & Agent (LN) (Light Novel)
Death March kara Hajimaru Isekai Kyusoukyoku (WN) (11)
Knights & Magic (4)
Genjitsushugi Yuusha no Oukoku Saikenki (4)
Sevens (4)
Seirei Gensouki ~Konna Sekai de Deaeta Kimi ni~ (2)
Expecting to Fall into Ruin, I Aim to Become a Blacksmith (2)
Recommendation Lists
  1. Things I've Read pt 2
  2. Stuff i read
  3. I read the manga first
  4. Reincarnated / Transmigrated as X Novels I have re...
  5. top-tier personal reads

Latest Release

Date Group Release
04/11/22 Bayabusco Translation c185
04/11/22 Bayabusco Translation c184
04/11/22 Bayabusco Translation c183
09/05/21 Bayabusco Translation c182
09/05/21 Bayabusco Translation c181
08/16/21 Bayabusco Translation c180
08/16/21 Bayabusco Translation c179
04/18/21 Bayabusco Translation c178
02/20/21 Bayabusco Translation c177
01/15/21 Bayabusco Translation c176
08/28/20 Bayabusco Translation c175
05/02/20 Bayabusco Translation c174
03/21/20 Bayabusco Translation c173
01/13/20 Bayabusco Translation c172
10/27/19 Bayabusco Translation c171
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66 Reviews sorted by

CaptainToast rated it
August 14, 2016
Status: c24
I don't think the author actually knows how to write about his own characters. The MC is suppose to be a lifelong special agent. Essentially raised from birth to be the best agent in his first life. He had at LEAST 40 years of active service in a occupation that likely had an average lifespan of 3-5 years. He was known as the best. He would of had to been ruthless as hell to stay that way.

The way the author writes about him makes it seem like he's a teenage... more>> boy who just happens to know how to kill people.

If the author wanted to write about a happy go lucky MC, than he should of had a backstory that actually fits his character.

Totally misleading. <<less
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Ardavix rated it
April 14, 2016
Status: c32
I have mixed feelings about this series. To be clear, it’s not a bad series but it’s so unsatisfying.

Meet Serius, our MC, strong, wise and reincarnated. In his past life Serius was a great military figure who died in order to complete his mission ~ a mission that was meant to be his last before retirement. He wanted to – after retirement – become a teacher for the younger generation of military cadets; to teach them how to become good commandos. Although technically he already had disciples, he was... more>> still at the forefront of his military career. In short, he died during his last mission and was sent to another world where he decides to become a teacher all over again. He developed very advanced magic techniques and formulas based on his past world’s knowledge of warfare. Unfortunately (or perhaps fortunately) he is deemed to be incompetent at magic by his noble father due to his attributeless magic aptitude. Serius later disowns himself from his family and starts his career/life as a teacher in another world along with his two disciples that were taken/rescued from the clutches of s*avers.

Pretty sweet premise right? Unfortunately, Serius does not at all feel like a military man. He always hides ~ always! Afraid to offend anyone. I get that he wants to live a carefree life as a teacher but that doesn’t make for interesting reading! He always hides from trouble like Satou from Deathmarch despite being super OP ~ like Satou. Likewise, everytime it seems like the author is going to introduce some badass plot whereby Serius shines brightly, it’s always passified/dumned down to be pretty much diplomatically resolved... this isn’t real life ok!? Be awesome... I want to read awesome... because of this, no one knows just how OP Serius is; likewise, based on how the author writes things ~ it's very likely that no one will ever know ~ save a very small few.

It got to the point where the only way for Serius to be bold and do awesome things was for someone close to him to coax him; accordingly, this led to paragraph after paragraph of unnecessary dialogue between himself and person-x... which in turn led to a cliff at the end of a long chapter; all the author would have had to do was give Serius a slightly more aggressive personality and the chapter-lengths would end up being less than half of what they currently are. Additionally, when event-x finally occurred 2-3 chapters later, it was always completely underwhelming... the first 10-12 chapters of the novel were good tho.

For some, this isn’t a problem but for me, I was expecting a lot more due to the premise and I was definitely disappointed.

2/5 due to enjoyment; I ended up dropping it after 32 chapters

Also, you should be aware about how looooooooooong the chapters are; expect to spend between 30-45 minutes reading 1 chapter. <<less
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ampzz rated it
July 2, 2016
Status: c39
How unrealistic does this title want to be? Even for a fantasy title it's full of itself. A one year old child cannot, I repeat, CANNOT start doing strenuous physical exercises regardless of how made up of a story it is, heck, most can barely even crawl.

Worst part is considering the main character is meant to be an ex-60+ year old man his maturity level is worse than a teenager's yet eventually gets into relationships (physical ones at that) with people who are barely teenagers themselves...

Worst part would have to... more>> be

later on when the focus goes completely off the main character focusing instead on the side character running around gathering up a harem for himself even though the MC is basically the one doing all the heavy part of the "saves".

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lonewolf93 rated it
January 25, 2017
Status: c56
I don't think the author has never met an old person in his entire life, you know besides his/hers (who are we kidding, it is obvious the person who wrote this pees standing up or at least likes to pee while standing) parents and occasional old person in the streets. Beside the lack of research and mismatched personality of the MC (TYPE-7-JESUS-KUN), with his backstory that mesh as well as dirty oil and c*m, there is nothing great about this story. It has the same problem as most LNs in... more>> this genre. It is the waifu of the month story (the waifu of the week is more like those r*pe novels, I mean mature novel since the love here is supposed to be pure).

I wouldn't have any beef if this LN novel just limited itself at that (the stuff I just described) however it has the audacity of pretending that it's fights are epic while they are among of the worst fights described ever (he is like a poor man's deva path Pain, and yells "impact" like a deranged person. That fight against the principal was so forced into the story, that you could feel the entire novel bleed from the a*s thrusting it just got), also the name Sirius teacher is just ridiculous. It 's like I just decided to name myself (insert s*upid name here).

Fails as power fantasy for nerfing it's hero for no adequate reason. Fails as an action action story. Fails as an assassin for obvious reasons (powers and personality). And finally, fails at most things for following the flawed LN formula. However it is probably getting an adaptation because japan's low anime standards in the future.

All in all it is not that bad. As a first LN, it could be passable since it is a good introduction in this genre. It isn't inoffensive in anyway really (besides the fact that it really has nothing of substance), if you are into fluffy stories with a bit of action and overall a casual read, you might as well read it. <<less
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happy123 rated it
May 17, 2016
Status: --
Pretty good start, but as it continues to later chapters the MC doesn't show the fact that he was once an assassin with a whole ton of experience. Still a good read for passing time.
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Zedzack rated it
August 15, 2017
Status: c88
I liked this story, don't mistake that, but after the latest chapter (88), I was really disappointed by the way this story is taking.

The author spent all that chapters uselessly reminding us that the MC is strong, female MC are loyal to him, won't trouble him, and yet the first thing he said when ... more>>

things fell through in the chapter was that her action was not wrong... So bringing unnecessary trouble to a trained assassin (who has no qualm killing people).. is good action by wifeys?

I know that the story need progression, but the way things are happening are too s*upid, and I am too tired of the Jap (note that I do not read novels other than JP) 's cliches.


First of all, the story's been hijacked. When I read a freakin slice of life story (how it seems to me with all the cooking and whatnot), I want to read ABOUT the MC, Sirius and co., not some side character introduced in a few chapters back, who only appeared in one or two chapters. I don't mind when the story placed more focus on Reus than Sirius, the story need progression, I get that. But this side character I don't even care (or remember) doesn't even have a likable story. It just "I saved a random pretty girl somewhere (by betraying my mentor?) and now I am in love with her"... How long have you known her? Not to mention, what the f*ck was with that s*upid villain?!"You can use strong water magic, so become my underling" THE FREAKIN HELL?! Is he a kid?!


Last note, I was very disappointed when I was writing this review, so most likely I got some facts wrong. Also, not going to come back to this series again, I had enough of s*upid decisions made by characters in the novel. I refuse to read a novel (which I read for gratification purposes) that served only to aggravate me. Sorry translator/s for this series, you are doing a really good job, but a shitty (for a lack of better words in my anger) is still a shitty (still angry) novel for me. <<less
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Oz-kun rated it
May 3, 2020
Status: c85
Okay first the story is good from the start... That is only at the Arc of the MC growing stage. It was the arc before he go to the Magic School, the rest Is all tr*sh.

Why so? The biggest problem Is the author who like the 'Cool Effect' of a low-key person, seriously I can easily tell the writer of this story Is an Introvert. It was all written from all over the place.

How so?

It will be a spoiler part now so read It at your risk.... more>> At the same time releasing all my dissatisfaction from this WN.

Short Synopsis, I don't want you to think my review was a bias so...


Okay, It was the Arc of Magic School the MC who dislike the being In the spotlight, like I said earlier, the author Is so fixated from the Idea of OP low-key MC, But the thing Is, the theme of his MC was a bit complicated, He was a Teacher, well at least for the three people, he is their teacher, So It was a contradiction to the thing he wanted to happen because It was literally Impossible for the MC to became a low-key person.

But If It was just like that, I wouldn't rant about that here. The most glaring Issue Is the MC who avoid resolving the problem when some haughty noble tried to ridiculed him from the masses while leaving It to his discipline receive the frontal confrontation from the annoying noble while limiting them, not to beat the Idiot noble thoughtlessly.

Meaning He left the endless cycle of being cursed, ridiculed, mock, to his discipline for 5 years! Would you look at that, Yep I ain't exaggerated at all. I even thought sometimes, If this MC is the type of who liked being verbal abuse.

Dayum bro~ That's a hella "M" out there. For 5 years he didn't budge for being mocked and ridiculed, leaving his discipline to be tormented for 5 years for the "Facade" reason to temper their mental fortitude, It was reasonable If the range was only for a month or two or even half year the longest... But the author Is so s*upid he forgot the side character has feelings too, He only realizes that fact at the end of the Magic School Arc.

Now you might be wondering where's the Introvert part? It was the point of being a low-key while avoiding the main problem and not facing It directly.

Meaning, some or rather half of this psycho writer mentality trait was being put Inside the MC.

There's a lot of more scenario that can explain why he is an Introvert, But I'll end this first part of ranting here.


This WN tried to revolve the world where the nobles, were the dumbest personage from the story, which I find weird, I think out of the nobles out there.

There are only a few Individual who has a so-called 'brain' out of 100.

99.9 of the noble inside the story were dumb as F. There's only 0.1 who is sane.

Which makes me wonder, how on earth that certain country Is still functioning with that kind of setting.

Good thing there was no politics tag or else, I might explode from anger.

Contradiction from this story Is heavy.


From the Princess route, It was the Arc of how the king tried to do a political marriage, while using his bastard daughter who is born from a mistress. She was being forced with marriage because If she refuses, her beloved sister will replace her place, the sister who support and helped her at the time of trouble. In short, she was being blackmailed.

But the daughter Is our MC discipline so, it was a matter of fact, of course, our MC won't sit there and watch her be forced out of her own will.

So MC will save the princess from the douche prince, well too bad the marriage partner wasn't a prince but a noble Instead, so our MC save our princess discipline with the help of her discipline beloved elder sister, he manages to sneak inside the castle at the castle where the ceremony was being held, our MC successfully manage to save the princess, after that It was arranged to meet up with the elder sister to secure their escape route, but after the event has calmed down, the king, their father goes to the place where's the elder sister was residing at first they're wary, but after knowing the king didn't send an army to chase or detain them, because he comes with only a single attendant.

The elder sister confronts the King with ease, awhile later, finding out the reason for the marriage was a sham marriage, the reason was to lure the wicked nobles from a sham marriage...

(Yeah, I was like what? After remembering the politics from this Wn, was nearly to zero sense, I Ignore the fact) Anyways carry on to the story.

After awhile the elder sister was so enraged from her father the king after a while MC group was called to the room for a discussion.

Then revealing a mind-blowing fact, Sister discipline wasn't a daughter from a mistress but the first woman the king loved before sitting from the throne, the elder sister was an adopted daughter from the king late brother who was the previews king.

Then the reason he came was to apologize for his long lost daughter, the reason behind why he was being cold to her own daughter was to not let her enter the world of politics or world of nobility, he was trying to protect her...

(I was literally speechless from that line, yep I know, he was trying to protect her long lost daughter... By using her as a tool for a sham marriage.)

I was so enraged that time, I keep cursing for almost thirty minutes.

-/:; () $&&"., ?! RAAAH!

Anyways after that, discipline daughter and the king "CLEARED" the misunderstanding, the daughter (fool) forgave him and they live happily ever after...

Wait that's not It.

After daughter and co made up each other.

MC was being questioned by the King because of the discipline sister fell In-love to our MC after he rescued her from the distress.

Throwing a father like line.

"I won't give you my daughter" something like that along the line.

(You don't deserve to say such words fool!)

There's a lot of contradiction from the story, but I choose the worst and heavy one.

But I thought, I already seen and read the worst from this WN, but It was not.

Reunion Arc from the douche.


After Our MC graduated from the School of Magic, he decided to go home, to visit his care taker grave, his second mom along with his three discipline.

But after visiting the care taker grave, he meets his old man and his half brother, his father was the one who blackmailed her biological mother and forced her then our MC was born as his bastard son while not having enough the douche abused his care taker leading her second mother (care taker) to have an early death, because of lack of protein and necessary supplements to enhance the body from overwork.

But what did our MC after meeting them? He tried to avoid them... But too bad he didn't succeed.

Then the douche father and co, have a talk to our MC, at first, the MC is being polite and just playing along the line, but after trying to exploit him, he refuses then his second brother says his ever brilliant plan, the plan Is to sold MC two beast-kin discipline from some sort of nobles who has a peculiar taste and train the princess discipline to his liking.

Of course, our MC, won't allow that! Then he decided to torture his half brother by injecting some mana from his body while Forcing his half brother to repeat the word he says

(This MC Indeed loved being verbal abuse)

and continue to torture him. In using mana Injection

(Which pretty much nothing compared to an actual torturing technique.)

Then he did the same from his douche father... Then after a while, he left them off, while showing the cool mantle he got from elder sister princess, It was like.

Look at mah cool mantle! Pig! I am not a commoner!

After awhile he spares the two.

YEP, he spared them! I was so angry I almost broke my smartphone screen!

RAAAAAAAH!~ #%^*+$&@?!

I even thought, the original author of this WN, from the beginning, died or sort like a stolen novel.


Really I think this WN was written by a 10-year-old kid or this writer is mentally defect person.

Well It seems my doubt was proven, from the last Arc I've read, I had enough...

Meeting Again Elf Waifu


When MC decided to become an adventurer, decided to travel around the world, he decided to go to Adventurer town, then coincidentally meeting from his long-awaited Elf Waifu, then stuff happened let's jump from the Important point.

MC having a date together with his Elf Waifu, but accidentally meeting the Elf pursuer who accidentally saw her face when her hood/disguise was remove. Guess what? Of course, It was another foolish noble.

Then noble-Kun saying stuff like you can't protect the elf waifu! I have a strong adventurer to protect her! So give up on her! I deserve her move than you do! I didn't approve this!

Then elf waifu was like, No! Stop bugging me! I already said I don't like you, I am already taken.

Then MC gives a proposal.

He will be joining the tournament and they'll have a match of course MC opponent was the noble-Kun hired adventurer.

If he wins, the Noble-Kun will stop bothering the Elf Waifu.

While It was not written to the storyline, you don't need 100/100 IQ to know what will happen If the MC loses.

After that noble-Kun accepted.

Then I finally snapped! This f*cking psycho writer, finally treating his character as an object, tools!

This damn MC Is treating the elf waifu as a trophy! Arrgh! That's my bottom line. It felt like I want to stab the author to death.

Then tournament started, finally the MC fight the hired adventurer WHILE giving him some pointers, the author clearly forgotten the real reason why he joined the tournament, He was teaching the enemies! Would you look at that! Yep! The writer is so dumb as hell he already forgotten the two has a conflict from the first place!

After that, the MC won the tournament.

Then the author Is clearly trying to avoid the topic of the foolish noble, tried to make If short and quick, while saying the noble will give up for the elf waifu and giving his blessing for them.

(LIKE HE OWN THE GIRL! Who the hell is that noble? Is he blood related? Past lover? No he is a stalker who keeps pestering the elf waifu!)

Then MC is was like, I can't be bothered face like.

f*ck YOU! NIBBA! You damn hypocrite! Why the hell you need the approval of that shitty noble?

Haaa~ I might die In frustration If this keeps up.


MC Is the type of person who gives some flowery words while doing the opposite.

MC :

"I won't treat those two unfairly"

(while leaving them to suffer the torment for 5yrs)

"I will make her happy"

(While avoiding her feelings for one decade)

"I promise that you will never regret accompanying me."

(While treating her like a trophy)

So Am I the weird one for hating this WN? I came here to read and have fun while seeing the growth of the characters but... I didn't sign to torture my head.

So I'll drop It here, read It If you like, I won't stop you. <<less
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Sumire rated it
November 10, 2016
Status: c57
The story was great until the MC decided to teach other students magic. I get his intention but the biggest turnoff a novel could ever make is mass training, Magi grandson is a perfect example, but we shall leave that alone. Aside from that the development until now was pretty solid except for the fighting scene where it's full of holes.

... more>>

in the fight with the head master, the MC can kill him or destroy his magic completely with just a missile based impact or a nuclear based impact if he want complete destruction, there's no way some kind of rock can withstand that kind of fire power. It might be because he doesn't want to so his true strength but still the hole is big. The same could be said with other fight scenes.


I would give this a 4.5/5 and keep enjoying it if he just quietly leave for adventure but the mass training make me drop it completely. <<less
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Melakias rated it
October 22, 2015
Status: --
Reincarnation story, MC was a really strong spy/secret operative in his previous life, taking a lot of students who loved him as their father. Dies in one last mission and reincarnates into a world of fantasy.

He takes time to adapt and quickly starts to train his body. A nice twist to the genre, the MC decides to tell those close to him that he's a reincarnated person, not keeping it a secret. He turns to have Null element for magic, which is usually considered useless, but he quickly creates powerful... more>> magic with it.
Decides to teach again in this new world.

Action, comedy, romance and a lot of feelings that will hit you like a truck and cry like a sissy, awesome story. <<less
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frenzy85 rated it
October 26, 2016
Status: c54
Realism aside, this is annoyingly childish...

It's fine early on when the events were all fairly light-hearted, but the childish nature of the story persists through more serious portions of the story.

... more>>

If you're considering reading this, perhaps the biggest consideration is whether you can accept MCs that show too much mercy as a plot device. MC is very passive, to the point where it endangers his allies. He himself is OP, so the author uses his weaker allies being in danger to cause tension... but this is only made possible through MC's unreasonable inaction. There's also an annoying amount of characters who repeatedly threaten the MC and his party, and the MC ignoring them. While one may attribute this to MC's ability to judge that they're just saying it as a front and have no ill will; it's quite unreasonable to completely take it at face value literally every single time... and this actually becomes a problem at some points where his party almost dies.


Personally, I find using such things as a device to move the plot to be quite annoying... but I'm also aware that there are many who can simply gloss over this.

Aside from this, though, it's all right; which is why I gave it 3/5 instead of a 1/5.

As a comparison to Death March, which is the most recommended title (the thing above Latest Release) :

MCs are both OP, but Satou is more so; but it doesn't really matter since both are barely threatened by anything. The main threats are towards their surroundings.

In the case of Satou, he creates a persona as a scapegoat for when he does OP things. Sirius just wings it and it results in his identity getting revealed a few times.

Satou, aware that his party isn't as OP as him, prepares many things for emergencies. Sirius... nothing...

The first time Sirius's party almost died was when Gremory brought in some mu*derers into the school they were at. He was already aware of Gremory's character, and he was also aware the Gremory isn't above using his students, as he saw during the duel thing. So when his two disciples were challenged by students from Gremory's class, what would one expect him to do? Well, whatever you expected, he actually does nothing. Later on, it's even revealed that he saw that the aforementioned students had some suspicious people in their party, but he just ignored it.

While the author tries to develop Sirius as a decisive character; he forces Sirius to inaction in order to move the plot. I actually had some expectations when Sirius said that Lior was indecisive but turns out author made MC even less decisive than Lior.

In the case of Satou, although he shows a very pacifist attitude sometimes, but it's not excessive and iirc never to the point where it endangers his party. In the most recent chapters as of the writing of this review, he killed a Demon Lord who he identified to be a reincarnated person. He also frequently acts as an advance scout as Nanashi before he goes around touring. In emergencies, we've seen his main priority is to bring the fight away from his party (as with vs. Dog-headed Demon Lord). When faced against potential enemies, he has shown some initiative in tracking them down instead of playing it passive (as with the various terrorist organisations).

Sure Death March has its flaws, but those are for a review of Death March. The points I brought up are things Death March did right, but was ignored by World Teacher.

They both are strong and ultimately never fail to protect their party, but there's a clear difference in how the authors choose to move the plot. In this regard, I prefer Death March as it sticks to its premise. Although you can argue that Death March's premise has Satou being too OP, I'm the kind of guy who can more easily accept stuff as long as its established in the premise of a story. If I'm unable to accept it, I'm able to drop it early and develop no bad feelings towards it.


As a comparison to Oukokukaizouki (2nd most recommended). uhh... well... I don't think they're all that similar, so I'm not sure why it's on the 2nd spot... So not much to say. Oukokukaizouki is a good story, though, so I'd recommend it in general. <<less
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emilia rated it
December 22, 2016
Status: c9
The story was quite interesting at the beginning but a certain development made me drop this series. I stopped reading after he saved a certain attractive female and their conversation made me cringe. Too much flirting especially considering he was 5 years old when he saved her.


”I’ll do anything you ask. You may even become my lover when you grow up.”
”Ah, I failed~. Thank you, my prince.”
- female

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Sherrynity rated it
October 2, 2016
Status: v8 intermission 2
Character: 9.5/10. They seem so... humane. MC is not the kind of unrealistic MC like other reincarnation novels, but someone who cares deeply for his family and showing it through acts, almost like a father figure.

Story: just your normal slice of life.

Translation quality: grammatically correct imo.

Read it if you want to know how this MC leadss his life in different world. Ignore it if you seek highschool brat-type MC who loves to flaunt his power.
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Ssjn4vega rated it
June 30, 2016
Status: c39
I love this story it's original and leaves room for growth, plus all the main characters are likable. Once the MC is older though I hope he accepts girls love towards him unlike quite a few mc's that wait till the end of the series to accept or confess.
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Renaxan rated it
December 14, 2018
Status: c152
Actually the start of this novel really good, we got some tearjerking moment and some real character development.

Story is about MC who is agent instructor in previous life reincarnated and want to keep to do same thing in his new life. MC is oddball overpowered gary stu, who can creating magic and flee into sky at age 5 and somehow seems know "all" dish from previous life. Some attitude of MC questionable altho he supposed to have 60y experience of life. Atleast MC isnt coward and bold toward his harem.

About... more>> other character, I could say they develop pretty well. His attendant and some side character isnt some "temporary" character that goes disappear after arc. They have background, some of them have their PoV and even their own story arc.

Talking about plot, this novel pretty inconsistent. They keep traveling and always meet problem to face like p*kemon plot story, but without real target to do (they dont travel to defeat demon king lol). The villain of story really variety but actually their ambition is shallow and cliche af. You guys can assume, MC and their companion always win like shounen manga does.

World building kinda foreshadow, I got slight vibe that this novel inspired from mushoku tensei but with op MC. So far, the continent position and how far they are travel isnt really described. Thats why I said this like p*kemon.

Overall, im enjoying this and author pretty do good job on character. However the inconsistent plot sometimes make felt bland to read + w/o real destination and villain, and thats only thing concerned me. 4/5 <<less
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lnv rated it
October 4, 2018
Status: c79
To start out, this novel is definitely worth reading for a few arcs, once past the school arc it start to decline somewhat until the tournament arc where I dropped it because of some really terrible development, more on that later, but I'll say it is worth reading the first few arcs as it is really good.

To summarize the story, the MC is a special agent who finds himself in another world after he dies as a nobles unwanted son. He learns that he has non-attribute magic which is considered... more>> terrible in this world. The reason is because non-attribute magic functions similar to molecule control magic. Since society doesn't have a good understanding of science, they can't take good advantage of it and it doesn't help that there isn't much research on it.

The MC in this story trains his non-attribute magic himself while training his body (becomes OP obviously) and at same time there is slice of life interactions between his 3 attendants. These interactions are done really well, and unlike many others the MC doesn't add one of the attendants to his harem. I personally like his story with Erina quite a lot. He later on finds 2 s*aves of a boy and girl wolfkin which he frees and ends up training (of course he has to first earn their trust which does take some time). The MCs goal in this world is to become a teacher, not a hero or anything of the like. So as others mentioned he tries to keep a low profile as he watches his students grow. Of course he has plenty of opportunity to shine, and he also uses his modern knowledge combined with magic to create new magic tools which he sells works with a merchant to sell. But he rarely the one who steps himself in the limelight.

If I were to rate the early parts, I would give it 4.5/5. This is also one of the few novels which did harem well (initially)

So why did I drop it? Let me get into this with the spoiler.


First, I want to get in how well the initial harem was made. The wolfkin girl who is the primary female lead does end up falling for the MC pretty fast. But it is more of a childish love at first and she wants to more or less serve him as a servant more so than an actual lover. She also admires Erina a lot who is the main servant of the MC. As time goes on, her childish love becomes more and more into real love (though of course part of that is mostly because the MC is such a high bar it's pretty much impossible to compete, even more so since MC is very mature for their age due to their previous life). In the school arc, the second female lead shows up. Over the time of the school year, the second female lead eventually falls in love with the MC (probably due to the food :P and other reasons), but the second female lead also looks up to the first female lead and has ZERO interest in taking the MC away from the primary female lead. The one who actually proposes that the secondary female lead also become MC's wife is actually the primary female lead. Partly due to her knowing the feelings of the secondary lead, and partly due to the primary lead feeling inferior to the MC. She also feels a bit conflicted about her role as a servant and her desire to be his wife. Since both of them get along, they agree with each other on this aspect.

And not only do they do that, they even agree that the first female lead has first dibs and that during the time that the first female lead makes their relationship official, they wouldn't interfere with each other. Aka, each character is given time to sort out their feelings and also time to spend with the MC without any shenanigans.

So consent from first wife, each one works out their own feelings and has their own personality, perfect (at least by non-romance webnovel standards)

Now then, fast forward to the tournament arc. The MC has the boy wolfkin enter the tournament to show his skills to the entire world. (The wolfkins second master who taught him the heavy sword won this tournament so he went in). Then as the arc progresses, the 3rd harem member shows up (the MC rescued her prior but after going home she couldn't come out until 10 years passed). I will refer to this harem member as Elven sl*t going forward.

Elven sl*t shows up and then tells the second female lead that she wants to bang the MC, but since she is so nice she pushes the secondary female lead to go bang the MC through peer pressure. But Elven sl*t is not done just yet! She then gets the primary female lead drunk to extract information on the MC and their relations.

Then Elven sl*t and MC take a walk around town and like all harem members she brings her own set of problems when a bunch of people who have been tracking them show up. Now normally the MC would just beat them up discreetly and call it a day. BUT, now the MC has an Elven sl*t! So he throws out all his resolve through out this entire story and everything that he has learned in his maybe 70-80 years he has been alive to declare that he will enter the tournament to gain fame so he can walk around with his elven sl*t. What about his student? Screw them, he has an elven sl*t now!

I don't know how the tournament came out or what not cause at that point I couldn't stomach it anymore. What used to be one of the better takes on harem and characters in OP isekai setting has turned into one of the worst takes on harem.

I have no clue what brought this on, maybe due to it starting to slightly decline, the author decided to go for something big to change the decline and instead destroyed his entire story and premises. Or maybe the author died and got replaced by someone else, I have no clue. But I simply couldn't stomach reading from there.

PS Erina's death was done beautifully and Hokuto is probably the only reason to read the story after the school arc. Hokato is the best character BTW. Ask anyone.

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2Girls1Cupcake rated it
February 19, 2018
Status: c100
I have to agree with the review done by Zedzack, you should check out his review.

I loved the first 70 chapters of this novel, despite avoiding this novel for so long because of the synopsis, I was pleasantly surprised and I got hooked, the chapters are really long too which just makes me even more invested in it.

But.. For some reason it just crashed and burned until the only thing left is a ashes, it's really a shame and I hope that it's only temporary, but we'll have to find... more>> out as more chapters are translated. <<less
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Tarlos rated it
June 24, 2017
Status: c20
Imagine if bashful woman holds a man's hands under a beautiful tree and says "I love you" and then kisses his lips. Awww, isn't that sweet and romantic? Now replace the man with a 5 year old child and the woman with a 200 year old granny. Suddenly it's a lot less romantic.

Okay, that might have been a bit of an exaggeration, but it's pretty close to what happened.

... more>>

Within 2 chapters of meeting a "heroine", the MC makes her fall in love so hard that she promised to be his lover when he grows up even though he's only 5 years old at the time, and she's well over 200 (she's an elf though so that makes it normal? Lol hell no)


This novel is slightly above average I guess. The characters are kind of cute (I guess?) but the "humour" is really repetitive. As for plot, there's really not much up to where I've read. It's basically a slice of life with training and eating food. <<less
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Liu rated it
June 5, 2017
Status: c33
Over descriptive and slow, unlike most slow paced novels I read. I don't get the feeling of anticipation with world teacher. It is the most unsatifying read ever, where one would expect to find a goal or work to achieve something or hell throw in some forboding, you get nothing with world teacher. The beginning was interesting and something to looks forward to reading about his growth. But now, although he is OP, most chapters he does nothing but aid in his disciples growth in tediously long chapters with content... more>> that could be said to be negligible in the wider scope of plot. The disciples (although I get that the are young) have the vibe of 5 year olds that always need attentive care or someone to wipe their asses and to be praised like the good little children they are.

I am quite frankly board and unsatisfied with the current arc, with its long and overdrawn description of what could be briefly called menial tasks. I'm sure that the story could pick up and that I haven't read that far into the story yet. But I simply just can't live though it. <<less
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thonnakorn rated it
June 10, 2016
Status: c37
So-So at starting point, nothing special. Feels like heart warming one than fighting story which I liked

One chapter impressed me and made me cried

I like writer who dares to kill good guys, the maid who raised MC as child died


But the main big problem for me is that MC is not good at teaching in term of educating. If you want to read something focused on educating system, go find something else!
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josh1002 rated it
September 7, 2016
Status: c49
If you're focusing on the "Other Worldly Agent/Assassin" part for the MC, I suggest you stop reading.

The MC WAS one, but left that behind and became a teacher for YOUNGER Agents/Assassins.

So while you'll see the MC knows about the ways of the underworld and black market, don't expect him to make use of it all the time as he being reincarnated wants to do things righteously.

... more>> Characters:
The MC is great. 10/10 benevolent with tons of experience whether be it cooking, fighting, martial arts, etc.

The main selling point though, is that he is willing to teach others be OP so long as they are people of good character. This is what the story is all about. The MC touching people's hearts and have some of them follow him as his disciples and will go about on a journey.

The other characters are pretty great too and is given quite a lot of growth while they're with the MC. You'll soon find yourself endeared to their devotion of wanting to be better than who they are.

Not much at the moment. Currently, it's all more about the disciples growth, so no demon invasions or world ending catastrophe yet.

20/10 artist. The art style really great for the characters.

Should I expect lolis?
Nope. Sirius is a b**b man. That is to say, a man after my own heart. A man I can really get behind. He's not a pe*vert, but knows when to appreciate such divine beauty.

Final score = 4.4
I gave it a 5 because some people write unjust reviews, crying out that Sirius isn't being "active" enough when:


He's been shown to kill anyone that recklessly tries to target him. If they try to hurt his disciples, God have mercy on their soul for their is nothing but death for them.


I will keep hammering this point. Sirius is not actively wanting to out attention on him as it could be dangerous. He's OP, but he can't fight an army and he has people he cares about and wouldn't put them in danger. He's quite satisfied being at the back and letting his disciples gain recognition. He'll gain recognition behind close doors with influential people, but don't expect everyone in the street to be praising his name and worshipping him. <<less
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