SY-217 Yukimi Emiru is a married woman in a shabby apartment, discovered by a student's parent

Yukimi Emiru plays a married woman living in a four-and-a-half-tatami-mat apartment, seen through a window with the Kanda River nearby. A man who was in the park is called out to by the mother of one of his students, who offers to clean his room, and he watches her work, reminded of his own wife. He finds himself wanting to marry her, despite the reality of the situation.