Maki Hojo is a tall, elegant, and beautiful teacher adored by her male students. However, she is set to marry her colleague Tabyuchi in three months—a fact already known to everyone around her. Among her students, Mita harbors special feelings for her. One afternoon, after a misunderstanding during class escalates into a conflict, Mita gets injured and heads to the infirmary, where he witnesses Maki and Tabyuchi passionately embracing. The next day, Mita approaches Maki and pleads, "I won't tell anyone, but in return, I want you to do the same with me." Hesitant but yielding, Maki agrees. However, other students witness the encounter and begin to corner them. Just as the situation turns dire, Tabyuchi arrives and rescues them. In that moment, their relationships take a drastic and irreversible turn.