A chaste married woman falls into the temptation of a sportsman's huge dick overflowing with lust. Even though she becomes sexless with her husband, a married woman named Ibuki starts attending a personal swimming school for self-improvement... There, she meets instructor Tanaka and can't stop thinking about his huge dick. Ibuki ends up having a physical relationship with Tanaka and gets sucked into the swamp of adulterous sex that her husband can't provide. The sexless married woman finds female pleasure in the giant cock of her instructor...
