Shizuka, who aspires to be a teacher, married her husband, who was in charge of education during her teaching practice. She has recently been appointed as a substitute for a staff member who is on maternity leave at the school where her husband works. However, even though she is a temporary staff member, her wish has come true and she is assigned to a class with a problem child named Yuki... Yuki, who finds it fun to make people cry, is intrigued by the shy Shizuka...