Six months into their relationship, a sudden incident occurs between Keiichi Koike and Michiru Shibasaki. For some reason, Keiichi is unable to enter Michiru's room and begins harboring frustration. Unaware of her true feelings, he feels uneasy about failing to fulfill his duties as a boyfriend. One day, reaching his limit, he forcefully barges into her room. What awaits him is a shocking scene beyond imagination. Michiru, having kept her dark side hidden from Keiichi, is devastated at being exposed. Witnessing her broken state, Keiichi is left struggling with how to confront his feelings for her.