VENX-176 A sudden visit from my wife's sister leaves me spent for a whole night and day Tamashiro Kaho

It's been two days since I saw my wife off on a trip. The living room was already out of control. The savior who appeared there was her daughter-in-law's older sister Kaho. She is Kenichi, who is surprised by her sudden visit but cannot thank Kaho for helping her with her housework. That night, when Kenichi was relaxing in the bathtub, he was attacked by a naked Kaho. "What are you doing, sister-in-law!?" "I thought I'd wash her back."