In a certain class of the first grade of a certain high school, a girl named Zhang Xin has a secret love for the monitor, while a rich girl named Bai Yueling is "brightly in love" with the monitor. The two girls fight openly and secretly, but they don't know where the monitor belongs in his heart. At the class party, Bai Yueling got the monitor drunk with ulterior motives; Zhang Xin left unhappily. But what exactly happened that night? After school started, Bai Yueling said she was pregnant with the monitor's child. But Zhang Xin discovered the secret of the monitor and her deskmate...