In this adult role-play, Kokoro plays a schoolgirl who is groped by the same older man on the train every day. Although she hates it, she masturbates while remembering him and wonders whether she is a pervert. Then her mother introduces the man she plans to marry—and it is him. His relentless abuse continues at home, where his persistent technique and huge cock toy with Kokoro's full breasts and gradually overwhelm her resistance.