The Adventure of the Boy With a Mind of a Middle-aged Man


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Grey Millard was born as the third son of the poorest aristocrat in the empire. In the Millard territory of the empire lives its feudal lord, Grey’s father. However, his father is being controlled by his fiendish stepmother. Disliking this kind of trouble, Grey is immediately determined to leave the Millard territory. Until Grey severs his relationship with his parents at 13, he devotes his entirety on self-improvement, ignoring those suffering under his stepmother’s tyrannical rule. But…

This is the adventure of a boy with the mind of a middle-aged man.

Associated Names
One entry per line
Karada Wa Jidou, Nakami Wa Ossan No Nariagari Boukenki
The Adventure Of Boy With A Mind Of A Middle Aged Man
Related Series
Return of The 8th Class Mage (1)
Death March kara Hajimaru Isekai Kyusoukyoku (WN) (1)
Going to Another World on Your Own! ~a Story That Begins With a Not-so-sweet Upbringing (1)
Recommendation Lists
  1. Hmmm..
  2. My List (Fantasy/Isekai) V3
  3. Reincarnation Station
  4. BG/BL - Novel Kids are Important!
  5. Genuinely good novels

Latest Release

Date Group Release
05/11/22 iNoveltranslation v4c49
05/09/22 iNoveltranslation v4c48
05/07/22 iNoveltranslation v4c47
05/04/22 iNoveltranslation v4c46
05/02/22 iNoveltranslation v4c45
04/29/22 iNoveltranslation v4c44
04/27/22 iNoveltranslation v4c43
04/25/22 iNoveltranslation v4c42
04/22/22 iNoveltranslation v4c41
04/20/22 iNoveltranslation v4c40
04/18/22 iNoveltranslation v4c39
04/16/22 iNoveltranslation v4c38
04/13/22 iNoveltranslation v4c37
04/11/22 iNoveltranslation v4c36
04/08/22 iNoveltranslation v4c35
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21 Reviews sorted by

DeirdreH rated it
June 7, 2020
Status: c14
Why do novels have to lie about their settings so much?

This is supposed to be the adventurers of a boy with the mind of a middle aged man, and yet:

... more>>

"I don't mind if it's you, Grey-sama, " Carla said cryptically before turning her back to me once again.

As I thought, the thought process of a child, and someone of the opposite gender, nonetheless, is a bit over my head.



"Carla, can you close your eyes for a bit?" I asked.


"Just close your eyes."

She stared at me for a while before her face quickly flushed.

"S-sure. I'll close them."

Her entire body was now as red as an apple and she raised her arms to her chest before meekly squeezing her eyes shut and pulling her chin in a little. I tilted my head in confusion at her weird behavior before teleporting her to Straheim.


Really? He's mentally middle aged and yet doesn't understand what that means?

Give me a break.

Edit: as of chapter 31 I'm deducting a star and probably dropping this novel. It's no longer reasonable to hope that this novel could remain as a solid three star or even improve.

Novels like this are already putting a heavy strain on the reader's suspension of disbelief in terms of what they make the main characters capable of, but as soon as an author introduces a character like Lilinor it's all over. Even though the author is self-conscious of what he is doing because he explicitly calls out how improbable the events of this chapter are, that's not enough to restore suspension of disbelief. <<less
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pomoli rated it
May 31, 2020
Status: c7
It's almost ok, but it lacks interpersonal relations and complex characters worth following to be truly interesting.

I guess it's only beginning, but I really hope the story gets more complex, or it would be just that.


  • MC is an older person, and he acts calm and composed, as expected of his mental age.
  • I'm really curious on the lore about truly strong people around, as for now MC is overpowered.
  • The translation is very good, a rarity in the shitty world of amateur Japanese translations.

  • MC is way too unfazed in the first reincarnation/transmigration chapters, he just goes with the flow.
  • Other characters aren't really fleshed out.
  • No one asks about how the MC changed from a forgettable kid to an absolute genius.
  • MC knows stuff, but he's way too trustful,

    basically revealing everything about what he can do to a random merchant, who of course trusts him immediately.

  • In fact everyone is very "modern Japanese" like in the way they conduct business : everything is smooth, a promise is always respected, no jealousy about huge sums of money spent, no barter, etc.. This degree of trust is simply insane.
  • MC blends too well in his family/environment, while he basically has no memory about the person he replaced.
  • Like any Japanese isekai or transmigration story, MC HAS to recreate soy sauce. I don't get this obsession.
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IsekaiMe rated it
September 3, 2020
Status: interlude
Chapter 39 changes everything!

The start of this all the way up to chapter 38 is kinda generic for a Japanese isekai/reincarnated type novel although I would rate it a little bit higher than the rest which is why I kept reading. I feel the MC is better than most as he knows that he's OP and has a plan in mind on how he wants to live in this world. However, the MC's actions in chapter 39 changes everything!

... more>>

He basically head stomps some pompous nobles and the "hero" for killing one of his subordinates. I'm talking full "damn the consequences, I'm just gonna unleash my anger" stomping. Did not expect it at all, and then his inner monologue expresses that he needs to change his world view and be more active in affecting the way things are in the current world he resides. Now this is what I'm looking for, an MC that's decisive and willing to use his power as he sees fit, good or bad.


Hoping this progression keeps it's direction and leads to more interesting things. Will update review depending on how things proceed from here. <<less
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kenjitamurako rated it
April 5, 2021
Status: v2c29
The author of this story does a decent job making something that you can binge read but unfortunately I have strong moral and philosophical differences with this author that I couldn't get past.

If I had to summarize the story feels like it was written by a man who has worked in middle management most of his adult career, has a strong fixation on the position of a scientific researcher and feels his life regret is not becoming one, but fully believed the dogma he was forced to peddle in middle... more>> management that was passed down by the execs.

There is one thing this author frequently pulls out, his signature move, that I really just got sick of seeing.

  1. The main character will encounter a group of desperate people who were attempting to do something either reckless or immoral as they viewed it as their only means to survive, usually rightly so, because corrupt leaders had subjected them to horrific abuse or a tragedy had befallen them or both.
  2. The main character will look at the group condescendingly and go off on a monologue that sounds just like a "This is why poor people are just so...." kind of spiel.
  3. He'll solve their problems while making it very clear he thinks very little of the people he's helping for not being able to think or do this kind of thing themselves.
  4. And he'll usually wrap up the end of resolving those problems with "see all you had to do to get out of this yourself was trust in the power of a capitalistic free market mindset and implement knowledge from another world that took centuries of refinement to reach but that you should have been able to discover for yourselves!"
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Delirious rated it
September 2, 2021
Status: v3c7
I'm honestly in awe at the individuals that claim this is so good the "bad ratings don't do it justice". Where? This is hands down an extremely generic Japanese LN. Doesn't necessarily make it "bad"; however, everything that IS generic about it is boring and has been done a thousand times.

Hell, after chapter 39 (where people claim it gets SOOOO good, lol). It almost immediately devolves into a Fairy Tale "friendship is power" troupe. His subordinates... more>>

literally get so pissed he got trapped and scared they awoke to new powers.

Also, he's smart? Sure, by comparison of the backwater planet he's on he could be considered a freaking genius. In our world? He's no different from an older college graduate scientist. At best, he might have a little more wisdom. Just because he doesn't blush and act like an idiot doesn't mean he isn't like a generic Japanese protagonist.

Case and point - how he got trapped? Basically just ignored every warning sign that was clear as day... After he

just got done fighting demons that were possessing people.

Ya, that's generic writing and a generic level of intelligence for a JP MC.

Anyway, this novel sits perfectly at a 3, maybe a 4 if you honestly enjoy it. However, that is completely justified. It's not nearly as amazing as people are trying to make it sound. <<less
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Arkazzy rated it
May 21, 2020
Status: c9
This is surprisingly unique and devoid of cliches. The MC is a genuine genius, not a psychopath but one that embodies the purpose of humanity as a race; To advance through the use of our collective knowledge. This novel acknowledges that the reason fantasy worlds are always stuck in middle ages is because magic is a shackle that blinds us to wonders of science and technology. The MC's entire goal in this novel isn't to build a harem, live a slow life, become the strongest or any other cliche garbage,... more>> he wants to completely change the system of the world

From the very beginning he has a sense of purpose and a goal you are genuinely want to see him achieve. He isn't a shitty, perverted salaryman with no self-esteem and lack of a reason for existence, which you would usually see in Japanese middle-aged men and it is like a breath of fresh air in this over-saturated genre. I am really excited to see where this novel will go and how the MC will singlehandedly uplift the human race in this barbaric world.

Only negative is that updates are inconsistent <<less
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nightstick24 rated it
October 23, 2020
Status: c52

The story changes COMPLETELY past c39. Everything else is a prologue, the story doesn't begin until then. It goes from a regular old 3 star to 5 instantly. Won't spoil it, but it's one of the biggest change ups I've ever had the pleasure of reading, that changes the MC and the story to the very core.

For Madae's review, like mentioned above, c39 is where the story comes alive. It's written the way it is to make c39 all the more... more>> great. It's not a joke to say the previous 38 chapters exist solely to set up that moment.

For DeirdreH's review, the title is indeed 'The Adventure of the Boy With a Mind of a Middle-aged Man' but it's not referring to a normal person, which should be obvious. Nor does it say "from modern day Earth". Or even Human. The MC isn't normal at all, at the very least he's an insane mad scientist, we still don't know who he is at all, who's to say he has any experience with love? It's silly to think that he would simply because it says 'middle aged man'. In addition, it's a fantasy world, with skills and the like. Who's to say Lily doesn't have a special skill?

On Worldrefrain's review. Like above, it's never specified that he's a regular middle aged man from modern day Earth, or even human. His race actually definitely isn't Human in the prologue.

On pomoli's review, I'm a broken record here, but, the story starts at c39. Until then, everything is a setup for that moment, done very intentionally. As for the cons mentioned, broken record again, nowhere does it say the MC is a normal, Human, middle aged man from modern day Earth, the MC's attitude towards his reincarnation is exactly right for his personality. He's cold, and analyzing. Nothing matters other than his research. As for trusting people, he doesn't trust people, he just knows he has the ability to teleport to ANYWHERE within 3km, he can leave the instant anything goes sideways. As for his relations with his family, he doesn't have any to worry about upholding. His step mother and two of his older siblings don't treat him like a Human, the one sister that cares about him is away at school all the time, and when she's not she's just worrying about him, not interacting with him truly. As for his sudden change, it's explained why it's not totally surprising later, around chapter 30 I think. Also, as for everyone being very Japanese-like, keep reading some, that's intentional, and goes back to the mysterious chapter 39!

The novel isn't perfect, I'm not trying to say it is, but I truly recommend reading until at least c39, it's one of the most interesting and charged moments I've had the pleasure of reading. From writing standpoint it's executed so wonderfully it's amazing. Honestly, just thinking about how well crafted everything was for that single moment makes me incredibly excited for the future of the story. Absolutely worth a read, and the chapters leading up to c39 aren't bad by any means, they're just intentionally generic. <<less
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April 28, 2020
Status: --
This probably would be "LET TRAVEL AROUND THE WORLD!!!!!" but every time he get's somewhere there's problem he would put his nose into it and do something and. The end would probably still half of the continent unexplored MC: "Let's continue the traveling!!!!!!!" The end

This just my opinion I would still read it.... maybe..... if its good.
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ilLUMIAnated rated it
November 9, 2021
Status: v3c3
I wanted to review this novel for a good while now, but decided to read it just a little further to understand what I truly expected and what the novel offered me against those expectations.

As many reviews have pointed out that chapter 39 of the first volume is a major turning point in how they view the novel, it did change my experience with it too. I was hopeful that I'd be getting a well fleshed out MC and other characters from that point forward, given how shallow the previous... more>> chapters felt in terms of character development. (Some might argue that characters did grow from the very start, but I digress.)

Instead of delivering the well fleshed out MC I wished for, what it produced was a poor imitation of Isaac.

Isaac is the sort of controversial Korean novel that you'd read where the MC is, in the truest sense of the word, a psychopath. Isaac hated being used by people like a doormat and whenever he moved, he caused tragedy to thousands. In a similar vein Sagami Shirabe/Grey Millard, the MC of this novel brings tragedy to a number of people, refuses to be a doormat and continues to fight. Sound familiar? Of course it does, it's similar to Isaac. But the differences between Isaac and Sagami are what make Sagami a poor imitation.

Sagami is, in true fantasy fashion, knowledgeable. So knowledgeable in fact that this otherworld made a jump in technology from his team building a steam engine to a straight up firearm. Not the early firearms though, that'd be a bit too realistic to believe now, wouldn't it? His company managed to hand craft bolt action rifles, something that should have taken decades of r&d to even come up with after a front loading musket, or even a flint-lock handgun. Isaac, on the other hand, didn't care for the otherworld's technology nor did he for any of the people in it.

Which brings me to the next point- the MC is supposed to be a middle aged man, but doesn't act like it. His emotional intelligence is negligible, with his interactions revolving around him wiping his subordinates' asses after they fail to take care of a mess and the frequent bludgeoning of scum that he encounters along the way. Not to mention the so called "harem suggestion" that author expertly places along the way which the MC is, in typical Japanese MC fashion, unable to pick up.

The author chooses to do a balancing act where the MC wouldn't spare enemies that he comes across in conflict and a kind and gentle lord who everyone looks up to. For this idea to work even the slightest bit it was necessary for the author to stray away from the run of the mill dense JP MC in favour of someone more emotionally intelligent.

But enough of that, let's take a look at the story itself.

The story lacks purpose, it's simply an action heavy SoL novel with mystery elements jammed in there, that for the most part, leave the reader confused instead of curious. The action scenes are well written, I'll give the author that. But what about everything else that's necessary for a good story? Nonexistent. The author literally introduced dragons, two of them, as MC's companions only to give them zero screen time. There's just so much clutter in terms of charcters, locations, plotlines and more that this just isn't worth sitting down to nitpick.

Overall, if you want to kill time and brain cells, this is your pick.

(Edit- I apologise for the lack of cohesion, the last chapter of this novel really did rob me of all of my brain matter) <<less
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DeadOpossum rated it
February 11, 2021
Status: v2c29
Every Japanese reincarnator must teach locals how to make a pump, soya sauce, and to say itadakimasu. A meteor shower is a must! This guy is no exception. Wait, he didn't make mayo and didn't bathe in hot springs with his harem! The princess didn't become his fiancee! On the other hand, the series is still going, so looking forward.

The author tries to be original by making the protagonist look like a mad scientist in a fantasy world. This does work to some extent, but still you have to disable... more>> some brain cells to not think about some absurdities. The most cringe worthy moment was when a group of teenage village thugs said "we are scientists in the first place and only after we are human"... Just skip it.

The sudden flip in the middle of the first volume was refreshing. The guy turned from a careless noble kid into a ruthless killer, that was fun.

All in all, it is a usual reincarnation story. It is written and translated well (the sentences are making sense). <<less
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slik rated it
May 3, 2021
Status: prologue
There was absolutely no way I wouldn't give this a 5 star. I like jp novels, and love any story were I feel I learn something valuable, applicable to real life, and for this story, I'm just like wowed, I literally gain a lesson worthy of being a life lesson for almost every chapter, for example... more>>

After their previous lord, the Davids, they had been misled and their land been taken by the kingdom while they didn't offer any resistance and just handed over hostages and food. For a country, no, for a person to live, they need dignity as well as enough food to sustain themselves. The moment they handed these away, they degrade into livestock.

Yeah, that's right. Livestock lead a little bit happier life. It can be a good thing to leave your fate in the hands of others, " I said. "Leave it to the rulers, to your tribe leaders, and blame them for your misfortunes. There's nothing easier than

, the story is top notch too. For me, to grow better as a human being while still enjoying my free time is bliss, this is my most worth while read in a long time. <<less
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unclebebby rated it
April 11, 2021
Status: c43
I love edge lord novels but this one is slowly killing me. Now that I'm on the second story arc the pacing of the individual chapters feel boring and the new characters introduced are so boring that I just don't care. This is not to say that the old characters from the first arc was great because they are not. They are all boring. I'm bored and tired. This novel should be called "the boring story of an adventuring 40 year old boring boring boring."
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juntaksadis rated it
February 5, 2021
Status: v2c7
u will find the MC have contradictive trait. At this point he just become s*upid.
thestory just use the same plot againt and againt atleast ill give u 2 example


when zem got killed and s*upid sh*t happen and when he found the feces family torturing kid and the he got s*upid againt, I mean he is and old man that really despise people who cruel to children or woman, the goblin lord give it up. Anyway the world already full of shit. This sh*t just make it worst

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December 17, 2020
Status: interlude
The story starts fine, which is basically about a genius getting cheats and trying to profit through modern knowledge after reincarnated into a boy (it reminds me of the MC in the series I’m the Evil Lord of an Intergalactic Empire!). However the school arc (after c54) and the cliches of dense MC with harem make the series go downhill (though there's the same problem with Evil Lord). I mean, why do jp novels always write about prodigy going to school and repeat those cliches? It seems like c54 would... more>> be the cutoff chapter for those who want to stop reading the series after enjoying the excitements brought by the previous chapters. <<less
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Togglingon rated it
October 29, 2020
Status: c53
I don't have the creativity to write as interesting and informative review as Nightstick24.

So incase you're wondering, chapter 39 is really the turning point of the novel. It's not the classic "Japanese" novel, at all. Worth a read, and I would recommend to read to atleast chapter 39, for the turning point, and if you want to see if it's truly good after that, read to chapter 53. Feels like that would be where "Volume 2" would end.

If you still can't decide, read Nightstick24's comment.
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Madae rated it
August 3, 2020
Status: c30
At the beginning everything was fine, the story was interesting no stereotypes, it was good. But now, it falls into the usual and boring Japanese cliché....... I give up........ it's no longer interesting...... ML becomes more and more passive and without any character.
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Fast_sec rated it
November 6, 2021
Status: v2c15
Novel is so so, not good and not worth continuing the read. MC contradicts himself more then often. Like others mentions, MC just goes with the flow. I understand that he's abiding by the laws, but when the laws are control by the corrupt nobles why even follow them, plus when you're the strongest, might makes right, period. No need to make an OP MC follow the law when he himself can be the law.
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ASStolfo rated it
October 2, 2021
Status: c54
The 2 stars purely for the battle scenes, outside that is all bad.

Firstly the MC's goal or drive. He keep blabbering about his goal of this truth that truth but what he did is only recreating what he had known from his previous life, I'd have give it even a bonus star to the rating if he HAD even consider something like combining magic with science, as that show how it will create something new, his so-called "door of truth".

Secondly, The MC personality. It's honestly the worst, not worst in... more>> evil way, but an evil MC would have been better than this MC. He is strong, yet have weak will, he is just like servant to any other characters, always doing whatever they want from him, and oh god he's so annoying to the core, can you imagine he show his secret to every person he meet, expecting them to keep it secret, but then all of them always spilled it, but then what? The MC just accept it, then why even bother saying it secret. Seriously

So the end, don't bother reading it unless you like this kind MC <<less
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SirJho rated it
January 12, 2021
Status: c256
A fairly entertaining story if you are looking for an op protagonist, combining magic and modern knowledge.

We are talking about a protagonist who thinks beyond his superpowers.

For me the best arc is the Raldons liberation, that does not mean that there are boring parts like the entrance to the academy.

Highly recommended.
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scribbledoutname rated it
December 2, 2020
Status: c53
Wavers between four stars and three, but it's four more often so that's what I'll rate it.

This is interesting :) A middle-aged man -- who turns out to be some sort of super genius, as far as we can tell -- dies and has his soul transferred into the body of a boy who's clearly just been murdered. The boy in this case happens to be Grey Millard, the mistreated son of a noble family led by a spineless man and his infuriatingly annoying wife.

Luckily, the MC accomplishes something supposedly... more>> impossible during his transmigration and is awarded with some cheats, including the ability to teleport around, see things within a range of 3km and combine ingredients to create grimoires that teach spells. The MC gets OP pretty quickly and then starts using his vast knowledge to pursue his ambitions (including getting filthy rich).

It's not an overly deep storyline but there are a couple of interesting mysteries and some enemies that can give the broken MC a run for his money. <<less
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