Satomi Suzuki's husband, on a business trip away from home, left her at home to live with her husband's former son. The kid is a university student, his name is Yuichi. Being absent from her husband for too long makes a woman in her prime feel more and more needy, frustrated, and uncomfortable, with the added sight of seeing her husband's stepson with a huge penis every day. erection every day while sleeping. Every day she restrained herself from masturbating, but beyond her limit, Satomi secretly took her son's penis in her mouth.