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Onani Master Kurosawa   
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Onani means masturbation. And that's what this guy is good at. Every day after school, he sneaks into the mostly unused girls bathroom on the 3rd floor, and masturbates. Until one day, when he's caught by a bullied girl with a hidden agenda.
This is a story of mistakes, redemption, and the choices made in between. It contains the worst and best of the human condition.


Related Series

Associated Names
Masturbasyon Ustası Kurosawa
Masturbation Master Kurosawa
Onanie Master Kurosawa
Onanii Masutaa Kurosawa
Мастер вздрочки Куросава
हस्तमैथुन मास्टर कुरोसावा

Groups Scanlating

Latest Release(s)
v.3 c.21-22 by Hidoi~! Translators over 14 years ago
v.4 c.Extra by Emergency Exit over 14 years ago
v.4 c.30v2 (end) by Emergency Exit over 14 years ago
Search for all releases of this series

in Country of Origin
4 Volumes (Complete)

Completely Scanlated?

Anime Start/End Chapter

User Reviews

4 topics, 22 posts
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User Rating
Average: 8.7 / 10.0 (2891 votes)
Bayesian Average: 8.68 / 10.0

Last Updated
February 12th 2024, 9:23am



Category Recommendations





Original Publisher

Serialized In (magazine)
Niconico Seiga (Niwango)

Licensed (in English)

English Publisher

Activity Stats (vs. other series)
Weekly Pos #436 increased(+104)
Monthly Pos #728 increased(+273)
3 Month Pos #1241 increased(+211)
6 Month Pos #1464 increased(+187)
Year Pos #1679 increased(+315)

List Stats
On 1425 reading lists
On 1342 wish lists
On 6639 completed lists
On 149 unfinished lists
On 568 custom lists

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User Comments  [ Order by usefulness ]
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by Ponkos
January 23rd, 2024, 3:31pm
Rating: 10.0  / 10.0
I don't think he's a master if get caught smh
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(nostalgic) masterpiece  
by brandito
March 21st, 2023, 10:06pm
Rating: N/A
Back in the day when we were kids, we read this series and got angry at
Spoiler (mouse over to view)
his crush dating another guy
, we were frustrated when
Spoiler (mouse over to view)
he publicly confessed and decided to repent instead of continuing his vengeance arc
, we were devastated when he
Spoiler (mouse over to view)
started dating the girl who was the main villain of the first few chapters
. Those feelings are natural if you're used to the type of one-dimensional hero/villain stories that dominate the mangasphere. If you don't want to read the spoilers, just know this: this isn't a series about childish revenge fantasies and righteous punishment for school bullies. It's a story about how who you are in middle school is just a microscopic portion of your life, and you get to choose how long that person stays with you. It may sound ridiculous, but more manga should emulate themselves off of this series about a guy who dramatically jacks off in the girls' restroom every day.
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Double standards, hypocritical preaching, and telling rather than showing.  
by Deago
December 14th, 2022, 7:36am
Rating: 4.0  / 10.0
The manga relied heavily on time skips and frequently failed to convey character development through showing instead of telling; major examples are failling to build the chemistry between Takigawa and Nagaoka, the author expects the reader to fill the void of said development that supposedly happened during the 40-day summer vacation; it doesn't matter whether the author intended to withhold the information about their relationship for the sake of 'plot twist' reveal, it's still a lazy writing and forced, and cheap plot progression for the sake of shock value.

Another example is the author conveniently placing that two-dimensional bully tsundere bimbo; Sugawa, in a situation where she seeks help, and Kurosawa happens to be there at the right moment, and coincidentally with the girl with whom she arguably had the worst relationship, and what a coincidence that she broke up with her boyfriend who beat Kurosawa and being available at the right time. Yet people think it's cute and natural. I'll return later to talk about Sugawa.

The manga contains a number of contradictory double standard messages, such as the author comparing Kurosawa's situation to Kitahara's because both were bullied. Are we supposed to forget how Kurosawa was ostracised as a form of retaliation? And how several other students began to sympathise with Kurosawa and assisted him in overcoming bullying, such as by providing emotional support or cleaning up his desk. Yet we are expected to be proud of Kurosawa for overcoming his own adversity while pitying Kitahara for not adopting Kurosawa's mentality and perspective on bullying.

While the manga effectively depicted the negative consequences of child bullying, it failed to maintain a sense of authenticity; we have Kurosawa's friends who supported him, such as Nagaoka, Takigawa, Pizza-ta, and Kobayashi and Erika (who were both presented as the class leaders and mediators), that's nice and all, but they all did absolutely nothing for Kitahara! All they did was watch the girl being constantly hurt and abused, the only one who noticed this was Kurosawa, who also did nothing but preach to the victim, this is an outright double-standard and makes the entire cast hypocrite.

And now back to Sugawa and her minions, who were constantly bullying Kitahara to the point of worsening her social anxieties; skipping school and being shut-in, and developing suicidal tendencies, yet Sugawa and her group, like the rest of the class, did absolutely nothing to show remorse and responsibility by reaching out to Kitahara, visiting her house, and self-admitting to that they were fully responsible for the way she acts, yet we are supposed to disregard all of that with an off-screen apology and believe that they have matured. What happened to "show, don't tell"?
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I enjoyed it  
by Raiden94
December 13th, 2022, 6:41pm
Rating: 10.0  / 10.0
Would be surprised with the Male Lead Character Growth..
That 'one' moment changed the story from generic to awesome..
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Don't read the last volume  
by Choror
December 7th, 2022, 9:31am
Rating: N/A
Really good and realistic manga, but the last volume invalidates everything that was being shown in three preceding volumes. The problem can be described in one sentence - The last arc is a NAIVE portrayal of aftermath of everything that has happened to that point (it's so clear, you'll definitely notice the precise moment when manga takes the turn for bizarre)
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Holy shit  
by MLGSwag
October 13th, 2022, 11:06pm
Rating: 8.0  / 10.0
For a manga about jerking it, it is really deep
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Sick premise, but once you get to read it's has quite the depth  
by Joese
January 27th, 2022, 9:13am
Rating: 8.5  / 10.0
I'd seen it various times as one of the top completed manga but was, repeled but it's description but once I got to it I finished in a swoop. Even though many might dislike how it's drawn in pencil for me its a plus, really reminds me of when I drew and some of the textures you can obtain.(If you feel disgusted skip read ch25 the conclusion is worth it)

The MC is quite perverted but he's crazy enough to be likeable ,and once you get over the premise it's more or less plausible. It's nice how it paints all grey and depicts bulling as don not only by the perpetrators but also the incantation of others and how even adolescents haven't formed themselves yet showing their insecurities and uncertainty about the future some feel.

I feel bad on how the girl didn't go to the reunion in the end, but this and how he didn't end up either her or the one he initially got close to is what makes it realistic. Also even though the is given all the 'screen time' the actions/reactions give rest of the main cast great depth and a variety of emotions .

... Last updated on January 27th, 2022, 9:17am
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by asley.vieira
January 10th, 2022, 9:05am
Rating: N/A
This is a masterpiece
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Great story flow  
by Theoneyedsnake
April 17th, 2021, 2:53am
Rating: 7.0  / 10.0
When I first started reading this manga I thought it was going to be a slapstick comedy the whole way through, but turned out to be a deeper story.

The author did a great job of making a roller coaster of emotion with a great flow. Everything felt like it fit, and there were no super abrupt changes in mood, rather a gradual change.

My one complaint would be that it seemed like the manga was slightly rushed in the last volume, it really felt like the manga could have gone longer.
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Weird but beautiful  
by deathcoy
August 26th, 2020, 11:38pm
Rating: 9.0  / 10.0
I read this like 12 years ago. I was cleaning up my library list and bump into this, even now i still fondly remember this manga.

Art style might not be for everybody but i find it unique.

As for the story and characters, i'd rate it pretty high. Its about a bunch of students, their coming of age story, maturing into young adults and coming into terms with reality. The characters feel human and relatable. Handles a lot of real themes like bullying, social withdrawal, unhealthy habits, human relationships, unrequited romance, regrets from making bad decisions but learn to face it, reconciliation and to forgive so we can move on.

I'd say don't be discourage by its weirdness, especially the title. Its a really good manga.
There are some who are dismayed by the pairing(which girl our protagonist ends up with) but i feel like its the most realistic. Eventhough its unexpected. While the ending, i dunno how to describe it, maybe bittersweet(for all the characters)? Basically the pairing and conclusion was neither the best nor the worst, its flawed but thats why its perfect because thats how life is.

... Last updated on August 26th, 2020, 11:53pm
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