A hot summer has come, Chiharu Sakai and his wife returned to their hometown to spend the summer together. That beautiful sister-in-law had fun with her husband's family during the summer months. They had fun with each other, but because of that, their love was broken. The feelings between the sister-in-law and the husband became closer from then on and one day when the two brothers watched a movie and ate ice cream on the sofa at home, while getting into the movie, the brother-in-law thought the sister-in-law was his lover. his hand, he touched her with his hand and the two of them had sex together right on this chair