23-year-old virgin Tatsuki falls for Erica (20), a waitress at a cafe he happens to walk into one day. But Erika was suffering from domestic violence at the hands of her boyfriend, Ryo. Tatsuki tries to rescue Erika from Ryo. However, the relationships between them become entangled with the presence of Tatsuki's sister, Yuka; a coworker at his part-time job, Mutsumi; and Ryo's older brother, Toru. Their fates begin to spiral out of control. The shocking suspense begins here.