Confinement King


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A girl who calls herself a demon appeared before a timid student named Fumio Kijima. The girl claims to be a campaign girl from the demon world and she gives him the ability to “summon a room” from nothing but thin air.

At first he doesn’t abuse his power and uses it as a convenient ability in his every day life. But one day he is bullied by his classmates under a false pretext and is made to suffer. In the past he would have wallowed in misery and cried himself to sleep, but now he had a power to call upon.

“I will make them regret it!”

Using his powers to summon his “room”, he begins his era of confinement and brainwashing to achieve his goals.

Associated Names
One entry per line
Related Series
Pure Love ✕ Insult Complex (4)
Inma no Hado (2)
Villain Seized the Assassin Heroine at the Start! (2)
Kaifuku Jutsushi no Yarinaoshi ~ Sokushi Mahou to Skill Copy no Choetsu Heal (1)
Himekishi ga Classmate! ~ Isekai Cheat de Dorei ka Harem~ (1)
Regressor Instruction Manual (1)
Recommendation Lists
  1. My Romance Novel 3
  2. Non-Typical Romance
  3. The Best Of The Best - ABSOLUTE BEST
  4. Harem(alpha mc)+Ero(no NTR)+r18
  5. novels for 'plot'

Latest Release

Date Group Release
10/25/21 TinyTL c218
10/25/21 TinyTL c217
10/25/21 TinyTL c216
10/25/21 TinyTL c215
10/24/21 TinyTL c214
10/24/21 TinyTL c213
10/24/21 TinyTL c212
10/24/21 TinyTL c211
10/23/21 TinyTL c210
10/23/21 TinyTL c209
10/22/21 TinyTL c208
10/22/21 TinyTL c207
10/22/21 TinyTL c206
10/21/21 TinyTL c205
10/21/21 TinyTL c204
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17 Reviews

New Asf
Oct 25, 2021
Status: c143
The beginning was quite interesting. The MC use some psychological stuff to lure the girl in for some revange s*x.

But after a while he began to look for more girls as his victim..

The harem gets really big. But the MC never care for all the girls under him. He just in it for s*x And is always looking for new girls to conquer. Or rather the author throws em at the MC as material to be conquered. All the girls in his harem dont love or care for him either,... more>> they just want his big Dic*

Even when the MC tried more ways to brainwash new girls at the end of the day they all just degraded to a s*x crazed idiots.

It just becomes repetitive and boring after a while <<less
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New sapnupuas
Oct 25, 2021
Status: c11
i dont know if im the abnormal one here or author but everyone treats MC like sh*t in class even when a bully uses violence on MC but they sympathize with bully and everyone fawns on him even when he injured him and blood pours from his head

what is this unreal situation,

author better come up with a good explanation for this or this novel is doomed cause bullying is accptable to some extent but this is over the top its like some chinese cultivation novels where their status is... more>> different so its impossible to go afainst them its like that situation

i have only this complain till ch 11 I hope this improves in next chapters <<less
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Dec 31, 2020
Status: c220
It's a shame that the translation for this is veeryy slow. The first arc reminds me of Pure love x Insult Complex since some character's personality fits to some degree. And as the title says, it's just about a guy with his ability to summon a room that evolves everytime (it just starts with a single room with no furniture and whatsoever)

MC is naive and weak, and along with the demon girl he is beginning to be influenced by her fiendish personality.

I can't describe the details too much since... more>> reading the raw hurts my brain and sometimes I can't even understand what's going on. But if this is translated correctly, then I'm sure it will give justice to the novel itself.

*My review after TinyTL picked this up*

The reason I really like about this novel is the slow brainwashing. Unlike other r18 novels that make girls fall in under a sentence, this one actually uses a push and pull method (idk what to describe so I made it up) of gaining attraction to a girl (not all but the first girl).

An example would be the MC being aggressive and rough enough to inflict a bit of mindbreak and then threaten them by means of abandonment (in which he removes their memories of him) and then capitalize the void of pleasure that he engraved in their bodies to make them willingly crave for the MC.

All in all, not the greatest novel but for r18 standard it gets an 5/5 from me.

Edit: I was the one who added the tags. <<less
18 Likes · Like Permalink | Report
Apr 30, 2021
Status: c261
This novel got to rank 4 in narou 18+ in just one year. It's indeed popular in japan and for many reasons.

First of all, the Protagonist has changes through the story. He becomes more assertive, more devilish even.

Another positive thing is that the story doesn't get repetitive, which is usually a problem with harem series: the author has a very precise knowledge of sects, cults and how their brainwash methods function. He probably is a fan of those. All of this give him many tools to work with, and the... more>> 3 arcs the series have are incredible entertaining.

Also, the pacing is so good. That's for example, a problem with very well written series like Pure love insult complex. Good series sometimes tend to forget they're an ero series, and the pacing of chara development and plot isn't good. This series I think nailed it with the theme, that let the author have a good pacing with the ero content.

As the series goes on, it gets better and better. Best novel in narou +18 in my opinion. <<less
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Aug 13, 2021
Status: --
Oh wow, bless the translator that finally picked up on this one, I really appreciate these barrages of upload man. People be saying that the revenge p*rn is the best part but the different kinds of manipulation that he does throughout the whole thing and the POV of the characters that are on the receiving end makes me like this one.

It's says alot when I'm more excited for the plot and schemes rather than the smut. Don't get me wrong, it's great and accompanied by hot art, but I'm honestly... more>> more interested in Fumio's plans more. <<less
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Dec 08, 2020
Status: c105
This is literal revenge p*rn, and sticks pretty well to the description and title.

The only real nitpicks I have are that I don't like the protagonist too much (he starts off weak-minded and getting swung around by the women around him, and he has an understandably twisted personality as well), and the demon girl serves as kind of a deus ex machina from time to time. Those areas are improved in the second arc, though his personality seems to get worse as you'd expect from someone who's relying on a power he got from the devil.

All in all, if the title intrigues you, it's worth taking a look.
7 Likes · Like Permalink | Report
Aug 23, 2021
Status: c200
Less messed up then pure love x complex but definitely makes you be on your toes thinking about the twist and turns that can happen. I guess you could call the scenes and revenge basic but the execution is well done. This isn't something that you can binge and enjoy though. While the story is slow, the corruption of the girls or each arc imo is great.
6 Likes · Like Permalink | Report
Sep 24, 2021
Status: c136
This one hits my fetishes pretty hard so I have to 5 star. The author said something like: “Raping someone hard enough to enrapture them is just a fantasy. However, you can manipulate/brainwash them into it.” It is a statement that gives pretty good insight on where the novel tries to go. The second part of that statement has been pretty well executed and shown, and there has been some 6/5 content in that regard. However, the first part has kind of been discarded in a lot of cases.

I think... more>> the author has some fetishes or at least a lack of aversions that brings the story closer to ntr than I would like too. I think one of the girls in particular can kind of show what all the pitfalls this one runs into are:


The first/worst girl he kidnaps is his bully’s girlfriend. The devil that is managing him uses a bunch of brainwashing tactics for weeks to get her to fall for the MC. It was actually pretty interesting and well done. Well, all that ends up getting thrown out the window. She is given the choice of staying with the MC or going back to her old boyfriend for some reason, and she chooses the old boyfriend.

They let her go after erasing her memory of the time using mc’s power, and she returns to her old life. She sleeps with the old boyfriend, and we get it from her POV while she sucks him off, swallows, then gets a creampie from him. It turns out she isn’t satisfied with it. So some stuff happens and eventually the memory of mc’s big pen*s along with a convenient moral excuse to give up the old boyfriend lead her to go back to MC. From this point the MC welcomes her back with open arms and throws her right at the top of the hierarchy he has built among the people he has kidnapped. To top it all off it turns out she is even a tsundere.

Why was the entire brainwashing and content of several chapters discarded? (She still doesn’t remember it even after going back to mc) Why did the supposed fantasy of raping someone for affection win out in the end?


this was definitely the low point for the story so far, but you have to remember I am giving a 5 star review even with this happening. The other parts of the story hold up and earn back any lost points from this. <<less
5 Likes · Like Permalink | Report
Sep 03, 2021
Status: c145
I still do not get what the relation between s*x and revenge is in this type of story. I can understand the humiliation and horror of the act, but at the end of the day the story changes and the victim of the r*pe ends up loving the perp. So it is s*upid. The suffering of the MC indeed justifies a revenge, if you read at least some chapters you get pissed of as how bad this bastard is treated and end up desiring for a revenge. But as he... more>> r*pes everyone you end up geting a s*upid boy that only work over with his sexual urges. If the story foccused in some psychological side and he got to destroy his aggresors like that and berated them I would be pretty satisfied. But at the end of the day this is not my story and not my cup of tea. If you like s*x and is not bothered by r*pe that evolves to """love""" with the girls being send to s*ave status over a big dingus and fast hard sex, this is for you. It is not for me. <<less
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Jun 02, 2021
Status: --
If you like pure love x Insult complex, then you should read this. (Though you have to read mtl since the story is not fully translated)
4 Likes · Like Permalink | Report
Sep 16, 2021
Status: --
I liked it at first actually. Its just that the whole f*cking thing is infuriating! The characters are somewhat abnormal! Just take the MC for example, the way his mind works and his monologue just makes me thinks hes s*upid! Literally s*upid. And its as if almost all characters have mental disorders that the way they behave is out of the norm majority of the humans does. Maybe thats the point of the whole story. I just think that its not that good. There is this sudden change on POV... more>> that literally happens all the time that if I were not careful it would throw me off and I get confused.

The s*x scenes are also very poor, I mean they literally speak out their thoughts in such a cheesy manner that I get goosebumps. The supposedly mature content does not seem mature at all, in fact, I find it childish lol. Its like it was just forced to happen.

The MC is also s*upid!


There was this instance it the earlier chapters where he chose to kidnap and confine 18 females from a single club the "track and field" club. He found it burdensome or something, or he was just too lazy to thoroughly look and investigate for the group of girls that harassed his beloved mai-chan in the earlier chapters that ho decided to confine 18 girls at the same time. The thing is, it was already risky since the school ad the authorities were already on high alert because of the case where 2 student went missing (which the MC himself caused). He was even scared of being found out and was avoiding them by using a rather well known group of criminals as a scape goat yet he f*cking confined 18 students at the same time in the same day? Truly s*upid to the point its infuriating.

This reminds me of another novel "pure Love X insult complex" where the MC is as infuriating and s*upid as this one and where the characters are also very abnormal (which seems to be the whole point of the story). The s*x scenes is also as unsatisfactory as this one. They F**k for who know how many time while ejaculating inside yet they dont even get pregnant lol.


Its not as good as "Cuckolding wizards adventure". <<less
3 Likes · Like Permalink | Report
Oct 06, 2021
Status: c170
I'm curious about the psychology behind his mind breaking and love to read how the females become corrupted.

s*x scenes with those MC finished to corrupt seems boring to me and I just mostly skip those parts.

There's also hints of a potential plot line about enemies so I'm curious too on what will happen.

One thing that I don't like though, is that mostly new characters or the ones that just only saw him still refer to him as "fat". He just have s*x many times with many girls, surely he would... more>> be fit by now? Smh <<less
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Sep 11, 2021
Status: c300
I have been reading this one from when it was just 10 chapters, and guess what here I am, seeing it raise in popularity.

TLDR : if looking for the best 18+ syosetu. Com novel, this one is definitely win above others.

Summary :

Story : 8/10

As it was in 18+ section, this is the best score I ever give from that section, story pace is solid even until the current chapter, and all heroine is given almost the same screentime, and how they develop their relationships ... more>>

although almost all of them started from r*pe, there are also that start naturally


Characters : 9/10

Fumio is definitely one of the best MC ever existed in 18+ WN, he started weak, and being trained by his partner


on almost everything related to his current achievement, his character development is shown very strong as his relationship with the heroines, and servants develop over time.

Main heroine : currently there are 4 main heroine

the first victim, the wealthy pettan, the demon, and the first love crush

and several sub. I love how the author developed their relationships with fumio very differently, especially with the demon, as she is basically his partner, his teacher, and his soulmate, and the main reason for fumio character development in the story.

Ero : 7/10

It's a bit lacking for me despite the genre, but still a satisfying one <<less
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Zena Chan
Zena Chan
Aug 29, 2021
Status: c63
I will say this if you guys are searching for s*x and a story with a good harmony than you are at perfect place you won't regret reading this it just that the novel have slow translation but yeah over all it awesome I don't know about live x insults I think somelike this was the name of a novel I am gonna read it in future but for this I can say that it's definitely good I don't even write a review and this is first one so just... more>> think if this is my first review how much I have really liked it, the thrill while reading it was too much I was even suspecting myself if other members of my family aren't watching me from somewhere laught by myself or listening me laughing creepyly

Also this have A good realism if you consider the story properly unlike other novel like got power -->and got the girl in love with me[NO THIS ISN'T IN THIS ONE SO YOU CAN LOOK FORWARD TO THE STORY]

Dude I an really saying to you read it

You Won't Regret it!!! 100% <<less
2 Likes · Like Permalink | Report
Oct 23, 2021
Status: c340
I spent 10 days skimming both the TL and MTL and going to rereview it after I am in a post-nut clarity. But for now, it's good.
1 Likes · Like Permalink | Report
Oct 21, 2021
Status: --
A guilty gap. None the less, it is well written and I've enjoyed the story so far. Honestly there is a lot I wish to know still and I plan to follow this series later on in the future.
1 Likes · Like Permalink | Report
Oct 18, 2021
Status: --
About 3.5 stars, I cannot give it a 4 because there're parts where it can be infuriating.

This novel had no clear goal, it's best to say that MC gets random hiccups and that will eventually become the so-called plot.

While it's a revenge-themed story, I think it's very much insufficient to be one. The reason is simple. He got bullied, but I don't read much hate from MC's side.

Or pretty much anything. He does seem to hate, love, care, or be protective of certain characters, but it doesn't feel like he... more>> does. Even with the relatively dark stuff, still I don't seem to be attached to it.

It's almost like for everything you read in this story, the Author is busy on how to line this one up with the next girl. <<less
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