Sumaki chose to continue teaching after marriage. However, the already busy life of a teacher. Balancing family and work was difficult, and the marital relationship had long since grown cold. In this situation, he visited the home of a student who had stopped attending school. The struggles of the father, who is the guardian… Two people, each embracing loneliness, are drawn to each other. Knowing it's wrong, they still can't turn back and sink into an inescapable muddy affair.
