After losing his job and being thrown out of his home, 30-year-old Yuichi moved in with his brother and sister-in-law until he could find new work. But he never felt welcome there, and his brother mocked him every day for still being a virgin at thirty. Desperate to gain some confidence, Yuichi made a heartfelt plea to his sister-in-law Yuki to take his virginity. She felt sorry for him and agreed to give him her body for just a moment, but the instant he slipped inside, overwhelming pleasure shot through her...