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お尻の開発に目覚めた學年主席の優等生・松月。ある日、放課後の教室でアナニーしている姿を同級生の京嶋に見られてしまい、黙っていてもらう代わりに目の前で続きをするハメになり……!?
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!!
*2025年5月更新:卷末新添加30頁商業番外篇。
*現內含單行本全1卷(1-9話+加筆)+ 特典 + 30頁商業番外篇同人志一本(同人志作者也是琢磨老師)。