After losing his job and home, 30-year-old Yuta moves in with his brother and sister-in-law until he can find new work. He has no place in their household and is mocked daily by his brother for still being a virgin. Desperate to gain confidence, Yuta asks his sister-in-law Minami to fulfill his lifelong wish and take his virginity. She feels sorry for him and agrees to give him only a little, but the instant he enters her, an electrifying rush overwhelms her. Their bodies prove so perfectly matched that she ends up repeatedly asking him to fuck and creampie her again.