One night and two days of 1 night and left alone by my wife's sister who suddenly came over

His wife went on a trip, and Naoto was living a leisurely life alone for the first time in a while. Suddenly, my wife's sister Nene came to visit me. "I came to help out thinking that I was in trouble on my own." Nei and the two of them work together to clean the room, but Naoto is unable to hide his confusion as he is persistently shown his cleavage and underwear. Furthermore, Nene's push is intensified and ends up having to mix bathing. Her body was washed in every detail...