"Sayo" who left her job as a teacher and became a married woman, and "Yoshino" who graduated from school and works as a trading company employee. Even though they were once a teacher and a student, they made a one-time mistake. And 12 years later...they meet again on the night of the class reunion. Sayo couldn't hide her upset, and her memories of her past inevitably revived, and she began to consider Yoshino, who had grown strong, to be of the opposite sex. Since then, instead of
