(I did it...) Yoshinori has committed an act of betrayal against his wife. This is because of his sister-in-law, Yuu, who is right in front of him. His wife went on a two-day and one-night trip, and Yoshinori was enjoying the freedom of living alone for the first time in a long time. Then, Yu suddenly comes to visit him. Actually, Yuu had come to relieve her frustration with Yoshinori... but there was no way for Yoshinori to know that, so he invited her in. Yoshinori, who was impressed by Yuu's housework, takes a bath, and Yuu comes to him...
