While his wife was away on a trip, his mother-in-law, Touko, was coming to visit. Kenta's wife had arranged it, as she was worried that he might be cheating on her, but Kenta was secretly happy. (To be able to spend two days with his beautiful mother-in-law!) His excitement only grew after Touko arrived. She was more beautiful than his wife, and had a sexy body. Tempted by the devil, Kenta peeked at Touko taking a bath, even though he knew it was wrong. However, unfortunately, Touko found him...