Before graduation, the beautiful class president, Hibiki Uta, was betrayed by her trusted mentor and subjected to aphrodisiacs, where she was freely played with and violated. (SDAB-260)

A perfect, beautiful girl who serves as the class representative is defiled by a sadistic science teacher...! This science teacher, obsessed with her, gives her a drug he concocted and rapes her while she's unconscious. Even worse, he films the lewd acts for blackmail and further abuse. Initially feeling betrayed and filled with hatred for this teacher she trusted, she gradually becomes a prisoner of his drug...!