After losing his job and home, 30-year-old Takuya moves in with his brother and sister-in-law until he can find new work. He still feels unwanted, while his brother mocks him every day for being a virgin at thirty. Desperate to gain confidence, Takuya makes a once-in-a-lifetime plea to his sister-in-law Nami: take his virginity. Feeling sorry for him, she agrees to give him her body for just a moment—but the instant he penetrates her, an electrifying pleasure races through her. Their bodies fit so perfectly that she soon finds herself demanding repeated sex and creampies...