C39 Be Teased by Your Sister

The moment Gu Zhengzheng entered the washroom, Gu Qianqian sneakily followed her. Since she didn't see Gu Zhengzheng when she arrived, she must have already entered. A trace of a cold smile appeared on her face.

Gu Qianqian entered the bathroom and tried the door. Only one door was closed. Needless to say, it must be Gu Zhengzheng inside