While her husband is away on a business trip, Yuka is letting her nephew Toshiya, whose family home is far from where he is employed, stay with her. She enjoys living with the cheerful and lively Toshiya, on the condition that she stays there until she finds a suitable room. But one day, when Yuka gets out of the bath, she bumps into Toshiya, who looks happy as he smells the warm panties she just took off. "T-Toshiya... what are you doing..." Yuka is confused, but she can't take her eyes off his tented cock...