Onanie Master Kurosawa

Onanie Master Kurosawa is a Japanese manga series written by Katsunori Sekine and illustrated by Takashi Takeoka, published under the pen name Ise Katsura. Originally serialized online in 2007 and 2008, the story follows Kurosawa, a social outcast who engages in solitary sexual practices at school until he is discovered by a classmate. The narrative subverts common tropes found in the coming-of-age genre by shifting from an initial focus on crude humor and isolation to an unexpectedly profound exploration of psychological growth, moral redemption, and the complexities of high school social hierarchies.

The series gained a cult following due to its grounded character development and the emotional depth Takeoka brought to the illustrations, which balanced grotesque situational comedy with genuine dramatic stakes. Its critical reception was largely positive, with readers praising it for treating its controversial premise with surprising maturity and empathy. Though it emerged from the niche world of internet-serialized manga, it is frequently cited in enthusiast circles as a standout example of how seemingly provocative subject matter can facilitate a deeply earnest narrative.