Keiko Amazato, the top student and school idol, is a diligent class president devoted to her studies. Unaware that her AV-obsessed homeroom teacher has been using her as masturbation material, she continues her daily routine. One day, she is summoned by the middle-aged perverted teacher, forced to perform a blowjob on his cock covered in smegma, then has her pure pussy brutally fucked and is made to serve as a cumdump, getting pounded over and over after school until completely drenched in semen—an explosive, shocking turn of events.