A few months have passed since Reiko's nephew Yuya came to stay with the Sawamuras because she felt lonely while her husband was working away from home. They were living happily without any problems until one night, when an incident occurred. When Reiko got out of the bath, she saw Yuya in the dressing room, engrossed in sniffing the dirty underwear that Reiko had been wearing only moments before. "What are you doing!" Reiko is shocked, but the sight of his rock hard cock ignites the fire in her feminine heart that she had almost forgotten.