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Synopsis

Shougetsu, an honors student at the top of his grade, discovers the wonders of developing his backside. One day, a student from the same grade, Kyoujima, sees him anal masturbating in a classroom after school. In exchange for his silence, Kyoujima tells him to continue what he was doing...?! A curiosity-filled high-schoolers' pleasure study love!! (Source: Shinshokan, translated) Note: Includes an extra chapter.

Official sites

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