When he was masturbating at a manga café, Mr. Hirasaki, a girl in his class, saw the moment of ejaculation, and Aihara-kun decided to show Mr. Hirasaki's masturbation as an apology! However, masturbation alone does not stop and develops into sex! - I want to pant out loud, but I desperately endure the first sex! Mr. Hirasaki is addicted to doing things where he shouldn't ...! Even at karaoke that came on the first date, I couldn't suppress my sexual desire and rolled up! A coming-of-age story with a beautiful girl who is happy with a flabby ecchi!