>One day, his mother disappeared with her lover, leaving the protagonist, Yoshihito, and his stepfather, Saji, behind. >Shocked at being abandoned by her, Saji quits his job and reluctantly takes Yoshihito and moves to his hometown in the countryside, but of course, life doesn't go well for Saji and Yoshihito, who are not related by blood, and their relationship gradually becomes weaker. >Yoshihito attends a local school, but he is isolated in class because he doesn't know anyone there, and he gradually becomes depressed. His homeroom teacher Harumi, who knows Yoshihito's situation and worries about him, visits his home to repair the relationship between his stepfather and Yoshihito, saying, "Leave it to me, teacher!"