SDAB-260 A beautiful class president, Utano Hibiki, is betrayed by a trusted mentor before graduation and drugged, leaving her vulnerable to abuse

The class representative, a flawless beauty who catches everyone’s attention, is defiled by a cruel science teacher…! The science teacher, who has developed an obsessive fixation on her, secretly gives Uta a homemade sedative and assaults her while she is unconscious. He then photographs her in a compromising state and uses the images to blackmail and exploit her further. Though Uta feels betrayed and comes to hate the teacher she once trusted, she gradually falls under the spell of the drug…!