Male 1: Shi Yuhao (looks like a toilet)
Female 1: Chen Yuanyuan (looks like a toilet ejector)
Male 2: Shen Huaian (school girl/girl 2)
Female 2: Chen Huaini (school beauty/male 2 hair girl)
Boy 1 and Girl 1 are a real-life deaf-mute couple. One is called "Hmm" on WeChat and the other is called "Oh" on WeChat. They pretend not to know each other on campus and they have sex every day offline. They are about to get into trouble with the principal. Boy 2 and Girl 2 are one of the sports committee and the other a representative of the Chinese class. The deaf-mute couple's parents are about to sever ties with them.
Concept: Disgusting deaf-mute couple