A dull college student "Dai" successfully dated the school Madonna "Mei", who confessed to her, and they fell in love with each other from the bottom of their hearts and lived together. A bright future should have been promised to the two people who lived modestly and happily. One day, classmate Yaritin, who had been eyeing Mei for a long time, committed a crime against Mei. Unaware of these things, Dai replayed a mysterious DVD that had been sent to him, and there was a picture that made him suspicious in his eyes...