A week after moving for work, a mother worries that her adult son Shinji has not settled into his new school. One day, she sees him being bullied by a group of adult classmates he had introduced as friends. Terrified but determined to protect him, she confronts them, only to become their next target. No amount of pleading wins forgiveness, and from that day onward she is repeatedly gang-raped and creampied in this adult role-play scenario.