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Boku wa Mari no Naka  
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Isao Komori is a college dropout who spends his days cooped up in his apartment playing video games and masturbating. The highlight of his day is visiting a convenience store where an angel-like high-school girl called Mari visits every night.
One morning Komori wakes up in Mari's body. Another "Komori" inhabits his old body, and Mari has disappeared. Komori struggles to maintain Mari's ordinary life and starts to investigate Mari's disapperance. Perhaps Mari wasn't so innocent and perfect after all?

Official English Translation


Related Series

Associated Names
Dans l'intimité de Marie (French)
I'm in Mari
Inside Mari
Я теперь Мари
나는 마리 안에

Groups Scanlating

Latest Release(s)
c.80 (end) by Crunchyroll over 4 years ago
c.79 by Crunchyroll over 4 years ago
c.77-78 by Crunchyroll over 4 years ago
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in Country of Origin
9 Volumes (Complete)

Completely Scanlated?

Anime Start/End Chapter

User Reviews


User Rating
Average: 7.7 / 10.0 (567 votes)
Bayesian Average: 7.64 / 10.0

Last Updated
May 31st 2021, 8:51pm PST



Category Recommendations





Original Publisher

Serialized In (magazine)
Manga Action (Futabasha)

Licensed (in English)

English Publisher
Crunchyroll (9 Vols - Complete; digital)
Denpa (7 Vols - Ongoing; print)

Activity Stats (vs. other series)
Weekly Pos #442 increased(+162)
Monthly Pos #948 increased(+209)
3 Month Pos #1347 increased(+130)
6 Month Pos #1530 increased(+209)
Year Pos #1668 increased(+123)

List Stats
On 1778 reading lists
On 769 wish lists
On 1036 completed lists
On 71 unfinished lists
On 354 custom lists

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User Comments  [ Order by time added ]
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Serious, realistic, yet annoying  
by zanaikin
August 29th, 2013, 1:27pm
Rating: N/A
Ever seen a genderbender/bodyswap manga where the guy experiences being caught unaware and unprepared by a menstruation period?

This manga takes the bodyswap premise very seriously, fills the characters with anxieties and problems with not a moment of romcom in sight. If realistic genderbent psychological drama is what you expect, that's what you get, with zero fluff for padding.

Warning though: both of the main characters are complete social rejects (bad personalities too, not just introverted) trying to fill in the life of a popular girl -- with a dark secret that makes it questionable which of them is more screwed up. Dark with an abundance of psychological problems may be normal for this mangaka, but doesn't make it any less frustrating if not infuriating to read. The lack of comic relief whatsoever makes this manga enthralling but not really enjoyable.

... Last updated on August 29th, 2013, 1:29pm
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its alot better than i thought  
by xeno01
March 10th, 2014, 4:21am
Rating: N/A
It's a lot better than I thought. I honestly thought I would be reading about an annoying MC that would endlessly frustrate me but I wasn't frustrated one bit. The piggy from Accel World is far more frustrating than this guy.

Anyway I'd like to start off by commenting on the MC's decision making skills, to me they made sense for him to make. Before the body swap he was originally socially ignorant and awkward, which explains his bad decision making. Since he isn't used to talking with girls and isn't quick witted enough to think of clever replies, especially under pressure he continuously put himself in unwanted situations.
To me the MC is very innocent and naive despite his age. That would explain why he refuses to do anything inappropriate with the main heroine's body. With his zero experience with woman he has developed a delusion of the main heroin being a pure-hearted girl that he doesn't wish to corrupt. In other words he has put the pussy on a pedestal.
The MC is your everyday weak willed personality. The mangaka is pretty good for portraying the reactions and emotions the MC felt. Most single-minded people who read manga would think "if I were in a chicks body I would start doing all sorts of naughty things" in my opinion I don't think that is a realistic view of the situation. Someone especially a man would freak the hell out worrying and wondering where his dick went. If I were in that situation I wouldn't know what to do either I'd freak out but at the same time somewhat contradicting my earlier statement I would at the very least play with the tities. (yeah I'm pervert)
Well enough about the MC when it comes to the manga's plot if your expecting some romcom or even just romance your not going to find that here. Instead you'll find an interesting journey of a weak protagonist trapped in his crush's body. He tries to maintain her image while experiencing the ups and downs of a high school girl's life. At the same time your trying to figure out the truth behind his situation.
For me this has been an interesting read very dark but interesting. I look forward to the next chapters. The artwork if your not familiar with the mangaka is well done, but it could be a little more detailed but I love the mangaka's style. If your tired of reading the cliched massed produced mangas that we all know and love/hate and are looking for something different and interesting this might be for you. In my honest opinion this manga isn't for everyone but I suggest you find out for yourself and read the first few chapters you may find it as interesting as I have.

... Last updated on March 10th, 2014, 4:34am
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Great so far  
by RoxFlowz
August 24th, 2013, 12:48pm
Rating: N/A
One of the best gender bender I've seen so far, it has a very realistic side to it. It's quite unpredictable, though I hope it doesn't take a dark turn.

@ jeffreymgibson:
It's not unrealistic. He explained the reason for not doing so. Even if you don't understand it, it doesn't make it unrealistic. In fact, it's befitting of his character.
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Best fictional story about DID I've read in manga so far  
by mysstris
October 8th, 2016, 5:07pm
Rating: 9.0 / 10.0
Spoiler (mouse over to view)
For a fictional story, this is a good story about a teenager who suffers from DID (Dissociative Identity Disorder). Often they're done on foolish accounts, taking DID in a lighthearted and entertainment POV (Othello and Akuma de Junai- the worst).This one is more slice of life. It doesn't go overboard with crazy drama. It talks to readers by introducing the idea of it without making the disorder a complete foreign entity that isn't understandable, only for crazy people, and that it would only happen to those who undergo extreme trauma like sexual abuse. The pressures and stress she underwent were strong on her psyche; accumulating over time. It's great her identity was able to reconcile and recover.

The downside is that without prior knowledge of this disorder, most seem to not be able to follow the storyline thus undermining the depth of this story. I suppose that is the interesting twist to this story because I went in thinking it was just another body switch manga but it is so much more. But there are definitely more pros and cons to the way this mangaka approached the issue.

One is that without openly stating what the disorder is, viewers fail to understand why the story turned out as it did. However in doing so, the mangaka does not sensationalize the disorder and create more stigma of crazy that the mental health field is perceived as. That's a good thing and I like that but it only goes so far when people fail to understand

Another issue is that by not addressing this with putting in a psychologist/psychiatrist (similar but different), it is a pro and a con. Con is that even though Mari's mother supposedly brought her to a doctor, the doctor dismissed Mari's vegetative state as a teenage angst stage. This is a con because it potentially paints a picture of how mental health is addressed in Japan. The pro is that the manga shows that a professional is not necessary in order for recovery; that through a social safety net, it is possible to recover (Yori, her brother, and the real Isao in some ways)

These are the more poignant things I wanted to address. This is fiction but it was an interesting fiction and a worthwhile read especially since I have a general knowledge of DID. Everything makes sense if you have a basic understanding of Dissociation identity disorder (no longer multiple personality disorder which is a term that has been taken over by entertainment like Hollywood)

... Last updated on October 8th, 2016, 5:10pm
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Unpredictable, Psychologically Believable, and Nicely Tangled, Relationship-Wise  
by cecropiamoth
March 10th, 2016, 5:34pm
Rating: 10.0 / 10.0
And that's what makes me follow all the manga of Oshima Shuzu avidly. The initial premise of a teenage awakening in the body of a girl he has a crush on is something that may have been done before. But what happens subsequently is consistently surprising. And that's true even though everyone acts, on a daily basis, like a human in their situation might reasonably be expected to act. There are no cliche developments in any of this mangaka's work, and this series is no exception.

He also draws well. He also paces developments well, so that enough happens/changes to keep you interested, without any rushing to the next development or the ending. Most fascinatingly, there are THREE people in this story, two of whom inhabit one body, and since they are teenagers there is lots of potential for yearning of various sorts, and it is very often unclear just who is yearning for whom. That really keeps the interest level high!

But the bottom line here is the truth I think this manga reflects—that many teenagers about this age would do anything to escape having to be just their confused selves, alone in the world in a period of change.

Oshima Shuzu is creative enough tell a story that is believable on the everyday level, creative and weird overall, and totally unpredictable as to outcome.

Manga are SO OFTEN cliched. This one is not at all.

... Last updated on October 4th, 2016, 6:34pm
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Captivating body-swap thriller  
by Dr. Love
September 7th, 2016, 1:47pm
Rating: N/A
As far as gender benders go Inside Mari is one of the more realistic ones. Komori's actions do feel like how one would act if they woke up with a girl's body, though out of respect & admiration for her he restrains any perverted desires. When it comes to the atmosphere the entire story has an underlying current of dread. Something feels off, but Komori (& the reader) don't know what it is. As it progresses one starts to wonder what an identity / an ego consists out of. Who is Komori really? Is he still Komori? Has he slowly adopted Mari's personality? It keeps you wondering. And the ending is something most would see coming as they go through the chapters, its natural conclusion.
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Surreal with a pathetic protagonist, but why am I not dead inside yet?  
by myopius
July 24th, 2012, 10:47pm
Rating: N/A
Yes! Another Oshimi Shuuzou work with a paranormal plot device that ties into existential themes, like Yuutai Nova! is what I thought at first, but in contrast to his other works, I actually chuckled a little bit when I was reading this.

With only 4 chapters out, so far it has been extremely similar to a typical body swap manga. Except done in Oshimi's usual "surreal" style. There's a hint that the female lead Mari may have a dark side similar to female leads of his other works, but it's been entirely his perspective so no info yet.

I could see this getting really dark, though. For example, maybe he will slowly inadvertently ruin her life, while she achieves fame and fortune in his life and bullies or abuses him using his body on her body.
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by Spearsmen620
June 26th, 2012, 3:05am
Rating: N/A
Four chapters out so far and only one word can describe this manga. So far, the manga has been not that dark, but given the mangaka's previous works, it will become spiraled into being a dark manga and I truly do want to see that happen. This genderbender manga will not be as light-hearted and comedic as most other GB series, so I would love to see what the mangaka has in store for the reasons behind the body swap. I would also love to find out what the 'secret' that Mari has that is said in the description.

... Last updated on June 26th, 2012, 3:06am
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Cannot be rated Yet  
by bull3thole
April 30th, 2012, 11:29am
Rating: N/A
The manga has a lot of potential. Just 2 chapters in and nothing happens yet. The author is really clever because he is making his reader anxious to find out the reason for the body switch.

I just hope that the author doesn't cancel this series just his last work "Yuutai Nova". This manga has lots of potential.
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When is it going to END  
by Bronia
May 3rd, 2016, 11:44am
Rating: N/A
It's good, but at this point I'm only here because I'm stubborn and need to ride it out. A lot of wild plot twists, but it's overstayed its welcome.
Solid art and very unpredictable. Not your usual body-switch manga.
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