After the sudden death of her husband, married woman Tsubasa begins living with her two younger brothers-in-law. When they refuse to spend money on the household, she tells them, "If you have that kind of money, I'll do something nice for you," and performs an explicit masturbation show. Later, while the youngest brother is bathing, she offers him a full-body wash, straddles him with her legs wide open, and rides him with intense piston-like thrusts, receiving a creampie. After draining his sperm, she seduces the second brother, sucking and licking his sweaty, rock-hard cock the moment he returns home. A thick, sweat-soaked incestuous affair unfolds between them.