Hikaru happens to witness a teacher secretly taking upskirt photos of a student. Using this incident to her advantage, Hikaru begins sexually teasing the teacher as revenge. With her aggressive, seductive nature, she plays dirty tricks on him every day. Each time, the teacher gets dominated and humiliated by Hikaru, gradually becoming aware of his own masochistic desires. As their relationship subtly shifts through these everyday encounters, a new spark ignites between them.