While cleaning her room, Saki Mizumi finds a suspicious bag hidden in the corner. Opening it, she discovers an obviously perverted costume inside. With her recent sexual frustration building up, she tries it on right away. Turned on by her own appearance, she immediately begins masturbating. When her nephew walks in and sees her, her arousal only intensifies. As if recalling memories from the past, she transforms into a depraved wife craving creampie sex.