While her husband is away on business, Yuka is letting her nephew Toshiya, whose family home is far away from his job, stay as a boarding house. - The condition was that she could find a good room, but she was enjoying living with the bright and energetic Toshiya. - However, one day... when Yuka gets out of the bath, she smells the warm, warm panties she had just taken off and bumps into Toshiya, who looks happy. - ``So, Toshiya... what are you doing...'' Yuka is confused, but she can't help but take her eyes off the cock that's making a tent...