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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: Crunchyroll Manga


Related Series

Associated Names
Dans l'intimité de Marie
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 7 years ago
c.79 by Crunchyroll over 7 years ago
c.77-78 by Crunchyroll over 7 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 (653 votes)
Bayesian Average: 7.73 / 10.0

Last Updated
March 23rd 2024, 2:02pm



Category Recommendations





Original Publisher

Serialized In (magazine)
Manga Action (Futabasha)

Licensed (in English)

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

Activity Stats (vs. other series)
Weekly Pos #673 decreased(-12)
Monthly Pos #996 increased(+87)
3 Month Pos #1655 increased(+357)
6 Month Pos #2033 increased(+511)
Year Pos #2915 increased(+221)

List Stats
On 1818 reading lists
On 840 wish lists
On 1262 completed lists
On 82 unfinished lists
On 401 custom lists

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User Comments  [ Order by usefulness ]
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An interesting read  
by Raiden94
August 29th, 2023, 9:17am
Rating: 8.0  / 10.0
This will definitely be a good read if you have a less or zero knowledge about
Spoiler (mouse over to view)
Dissociative identity disorder
.It will keep you invested to know what's exactly happen to Mari.
As for my case, since I know and have read about
Spoiler (mouse over to view)
Dissociative identity disorder
beforehand, I just read the manga to confirm my theory. Tho I can say it's a good read because you able to get a gist of what
Spoiler (mouse over to view)
Dissociative identity disorder
people experiencing even though it's a bit dramatic. Give it a try!

... Last updated on August 29th, 2023, 9:22am
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This would have gotten a better score if it was a touch tighter  
by flowinmyboat
June 26th, 2023, 10:02pm
Rating: 6.0  / 10.0
The premise, the general start/mystery, and the art were good, but it's everything in between that could have just been snappier. There was a whole lot of nothing/filler for the better part of this story...I got bored and just skimmed from chapter 20 to the end pretty much.

As far as gender benders go, it's as realistic as it's going to get and that's why the beginning was so interesting. However, the plot isn't really tight and things aren't well explained. This author usually likes vagueness and a psychologically messed up cast, but this story left too much to the imagination when it had 80 chapters to work with. It's not so much things need to be spelled out, but things flat-out just weren't clear. For instance, the whole 10 or so chapters with Mari's original friend group. It's clear these are shallow, hollow friendships and I suppose the author is trying to say that "real" Mari is a shallow, hollow vessel, but...okay? What's the point though? Did we need to spend so much time with these characters just for it to go no where? The love interest in this is also a piece of work and I didn't find their romance remotely endearing. They're teenage girls so I forgave the mellow-drama, but as someone said, it gets day-time soap-opera with it. The love interest also has their own life drama and that's hinted at and resolved, but never really explored in any level of depth.

Above all things, the "twist" was...anti-climactic as hell, to say the least, and beyond dumb for all the build up. I thought something horrific happened, but in reality, it wasn't that bad and because of that, I wish we'd learned more about Mari's parents relationship beyond what's hinted at and how & why it is that way since that seems like a HUGE part of why Mari experiences life the way she does. I also wish we'd gotten more flashbacks of the dynamic between Mari and Isao because we get some major things dropped on us in the last five chapters. You know those old detective stories where, during the final scene, the detective reveals THE mystery-solving clue and it's one that wasn't shown to the reader the whole story until that very moment, meaning the reader was left in the dark until the last moment? That's basically what happened. And then after allll that drama, everything wraps up WAY too neatly with a time skip. No talking, no addressing Mari's behavior, nothing. Just skip a year ahead.

My frustration with this manga in general is all the hinting without showing and the characters being half developed and all over the place. The pacing, as far as the story goes, isn't bad -- the author doesn't take you on a wild goose-chase or pull out a bunch of annoying red herrings, but it's slow and a bit too meandering slice of life for a mystery like this. Oshimi always adds a 'perverse' element to this work, which I appreciate, but here it was distracting and it could have been incorporated earlier. I really want to recommend you read it, but there are too many elements that are just half-baked from my perspective. Read if you are a fan Oshimi's work in general, but if this is your intro to this author, it's likely not the best.
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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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