APNS-200 Right now, a DVD containing the gang-rape footage of my missing fiancée has been sent to me... Nagatsuki Natsuki

Kitayama, the eldest son of a wealthy family, attended the same university as his childhood friend Natsuki, who is also the daughter of a wealthy family, and currently lives together. Despite being a student, Kitayama has effectively inherited one of his father's companies and is engaged to Natsuki. The two should have been promised a happy future. One day, some people who had a grudge against Kitayama kidnapped Natsuki in order to keep Kitayama away. A few days later, Kitayama received a DVD containing Natsuki panting while being framed...