Sayuri, a single-mother family living in a mountain village, was cleaning the house for her brother-in-law who was visiting from Tokyo. However, she was not calm in her heart, because she had a forbidden physical relationship that she could not tell anyone five years ago after her husband's funeral. And later, when the brother-in-law came to visit the Nishina family and became lively, the relationship with the brother-in-law was revived like in the past. Although I thought that Sayuri was wrong, my body accepted my brother-in-law obediently.