His wife went on a trip, and Naoto was enjoying a leisurely life on his own for the first time in a long while. Then, suddenly, his wife's sister, Nene, came to visit. "I thought you were having trouble being Nene, so I came to help you." The two of them helped clean the room together, but Naoto couldn't hide his confusion as she Nene showed him her cleavage and underwear. Furthermore, he gave in to Nene's strong push and ended up taking a mixed bath. She washed every inch of his body...