Kokoro, a high school girl, was molested by the same old man on the train almost every day. She shouldn't have done it, but she was masturbating every time she remembered that old man, and she started to blame herself for being a pervert. Then one day, her mother introduced her to the man she wanted to marry, and to her surprise, it was that old man who molested her. She started to be molested not only on the train, but also at home... Kokoro's father plays with her overgrown breasts, and she falls for his persistent technique and his big cock more and more...