When her husband Masahiko suddenly becomes impotent, Miku is left desperately frustrated. After he leaves for work, she takes out a massager and loses herself in masturbation, unaware that her father-in-law Eiji is spying through the doorway. Having arrived without warning, he sneaks through the couple's room and rifles through her underwear and cosmetics. Knowing their sex life has failed, Eiji forces himself on Miku's aching body...