Kazami Keigo (28), a high school teacher with a fondness for older women, is homeroom teacher to a class that suddenly gains a transfer student— Kotori Yomu (32), an active actress and the mother of one!? Yomu has been trying to convince her truant daughter to return to school, but her daughter fires back. "Did you go to high school? You were already working in show business." To persuade her, Yomu boldly declares that she’ll enroll in high school herself first— and even rocks the school uniform with enthusiasm! Keigo is completely thrown off by having a student older than himself, but the principal orders him to support Yomu’s “fun” school life. Surrounded by Yomu’s mature charm and seductive presence, can Keigo resist temptation and fulfill his duty as a teacher—!?