Encountered a Female Spy at the Beginning

Yang Mu thought hard for a while, then walked out of the men's room and stuck his head out. There was silence outside the window, and everyone else was busy. Yang Mu thought about it and quickly opened the door of the women's restroom. After entering the women's restroom, Yang Mu looked around and found that the pile of sanitary tools in a corner was unusual. In the corner of the women's restroom, there is a pair of footprints made of gray and white yin energy. The toes of the footprints should face the wall, and the heels should face the bathroom mirror. Yang Mu turned his head, walked to the washbasin in the women's restroom, and looked behind him through the washstand mirror. The reflection of the mirror happens to be reflected in the corner of the women's toilet... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.