In this adult role-play, Kana lives with her withdrawn adult son while her husband works away from home. She is delighted when her son befriends Akito, but Akito grew up without a mother and becomes obsessed with Kana's kindness. He exploits her sympathy and forces a sexual relationship on her. Though her mind resists, the deep thrusts reaching where her fingers cannot awaken long-buried desire, and her body gradually begins responding to him.