After losing his job and getting thrown out of his home, 30-year-old virgin Takashi moves in with his older brother and sister-in-law Tina while searching for work. With nowhere to call his own, he endures his brother mocking him every day for still being a virgin. Desperate for confidence, Takashi asks Tina to grant his lifelong wish and take his virginity. She feels sorry for him and agrees to let him do it just once, but the instant he penetrates her, an electrifying rush reveals how perfectly their bodies match. Soon Tina is begging him for more sex and repeated creampies.