Returning to the family home for Obon means a depressing midsummer gathering, but this year is different. His gorgeous sister-in-law, who always makes him nervous, begins seducing him. Frozen by guilt toward his brother and fear the family may discover them, he can only stand while she smiles, licks all over his body, makes him hard and rides him eagerly. Her obscenely skilled tongue and wildly moving hips leave both drenched in sweat and climaxing through a scorching August.