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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: Crunchyroll Manga


Related Series

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

Groups Scanlating

Latest Release(s)
c.80 (end) by Crunchyroll over 6 years ago
c.79 by Crunchyroll over 6 years ago
c.77-78 by Crunchyroll over 6 years ago
Search for all releases of this series

in Country of Origin
9 Volumes (Complete)

Completely Scanlated?

Anime Start/End Chapter

User Reviews


User Rating
Average: 7.8 / 10.0 (619 votes)
Bayesian Average: 7.74 / 10.0

Last Updated
January 20th 2023, 10:38am



Category Recommendations





Original Publisher

Serialized In (magazine)
Manga Action (Futabasha)

Licensed (in English)

English Publisher
Crunchyroll (9 Vols - Complete; digital)
Denpa (8 Volumes - Ongoing; Print & Digital)

Activity Stats (vs. other series)
Weekly Pos #828 increased(+32)
Monthly Pos #1317 increased(+334)
3 Month Pos #2436 increased(+117)
6 Month Pos #2896 decreased(-5)
Year Pos #3018 increased(+23)

List Stats
On 1794 reading lists
On 817 wish lists
On 1165 completed lists
On 79 unfinished lists
On 385 custom lists

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User Comments  [ Order by usefulness ]
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by Arsene1412
July 7th, 2017, 1:06pm
Rating: 9.0  / 10.0
I like how this manga makes focus on the characters and how the development in set up between the characters, the body switch plot is quite interesting and to the end it was pretty good, even though the ending could have been better with a better context, it wasn't any bad.
A lot of emotions were pretty well executed and it's a bit sad how it ended but still worth reading.
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Y'all need to learn to use the spoiler function  
by transbikes
November 8th, 2016, 10:43am
Rating: 8.0  / 10.0
Don't just post willy-nilly about the "twist" that only gets truly revealed in like, the last five chapters.

Regardless, this was a good manga. The body swap device was handled very well and realistically and the characters were engaging. The end left me a little, unsatisfied? I felt like there could have been much more left to explore post-reveal. But as it is, the manga was still worth my time.
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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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Misleading description  
by Megorova
September 14th, 2016, 6:44pm
Rating: N/A
Spoiler (mouse over to view)
This manga is not supernatural, and obviously not about body swap or gender bender. What it's really about - huge spoiler ahead.
MC is a girl named Mari. Due to childhood psychological trauma, she had issues with how she perceives herself, and people around her. Then she started to stalk after some guy (Isao Komori) that she met at convinience store. After she learned a lot of information about him (including reading his diary), one day she woke up and she had an identity disorder, and thought that she's Isao Komori, and that HE somehow swapped bodies with this girl Mari.
What's really happening could be predicted from chapter 12. So to drag a revelation to the very end, and make this story 80 chapters, for such a simple plot, story was too long.
Not entirely bad, but not something that will be interesting to read second time.
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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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A slow-paced manga.  
by LUEser
August 3rd, 2016, 9:16pm
Rating: 4.0  / 10.0
One of the things I find most boring about this manga is despite the body change,
Spoiler (mouse over to view)
with Mari's subconscious dormant and Hobo (I'm gonna call him that because I forgot his name lol)'s mind takes over,
is that I still get the feeling that Mari is still Mari (or that she acts like a typical female despite being taken over by a man). I never once think of Hobo as taking over Mari's mind; occasionally, I remember that it is Hobo, not Mari, who is in control. Yes, it is interesting in the fact that he is being humble and he respects Mari's body and he was trying to live out her lifestyle for her sake. The twists in the plot are actually pretty good and quite unpredictable in what happened in each other's past (particularly Mari's).

The artwork, honestly, is nothing to write about. No exaggeration and no surrealism/abstract/etc. So the emotional and mental aspects of this manga is pretty straight-forward, which is pretty easy to relate to. But I find it boring because there are hundreds of manga that allows readers to feel the same way. I would only recommend this if you just want a slight change from reading typical cheesy high-school romance manga...and if you don't mind the fact that is very slow-paced.
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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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Unpredictable, Psychologically Believable, and Nicely Tangled, Relationship-Wise  
by cecropiamoth
March 10th, 2016, 4:34pm
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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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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Frustratingly frustrating  
by Daitengu
January 9th, 2014, 6:42pm
Rating: 3.0  / 10.0
Pretty much sums up my feelings up to ch 22. MC has zero idea about the opposite gender, social dynamics, or even half ass lying. Not even the stuff one would normally pick up from mass media. Guy acts like he grew up as a hermit on a mountain without any skills to show for it. All that's going through my head is "This idiot, this idiot, this idiot, this idiot, this idiot, this idiot...."

Can't recommend this to anyone except those who like watching passenger train wrecks, or daytime soaps. Just about as ridiculous as those.

... Last updated on January 9th, 2014, 6:43pm
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