Chizuru, who left her teaching job to become a married woman, and Isejima, who graduated and works for a security company. The two had once been in a teacher-student relationship but had made a one-time mistake. Several years later, Chizuru moved next door to Isejima, leading to an unexpected reunion. Despite trying to hide their agitation, memories of the past resurfaced, and they began to see each other as members of the opposite sex. The former
