After losing his job and home, 30-year-old Yuta moves in with his brother and sister-in-law Kanna until he can find work. He still feels unwelcome, and his brother mocks him every day for being a virgin at thirty. Desperate for confidence, Yuta asks Kanna to grant his greatest wish and take his virginity. She feels sorry for him and agrees to give him her body for only a moment, but the instant he penetrates her, the compatibility sends a numbing wave of pleasure through her. She soon finds herself repeatedly asking him for more sex and creampies.