Miho and her husband agreed to babysit their nephew for a few days. Despite being confused by her nephew's focus on games and anime despite his age, Yui, who used to be a teacher, begins to show her caring nature. Due to her unfulfilled sexual life with her husband, Yui, without realizing it, ends up using her nephew's dick to satisfy her sexual desires. Then, her nephew, awakened to sex, starts to thrust his dick at Yui at every opportunity to satisfy his desires.