"What are you doing here?" Gu Ruoyan was even more confused. The rooftop was empty. There was no one.

"Just now, on top of the wine bottle tower, someone did something. Since this is the top floor, there must be a dark room between the roof and the hall." Zhan Ruomiao explained as he walked to a corner. He took a pair of gloves from his pocket and put them on. He squatted down to check the floor of the rooftop. "According to the location of the wine bottle tower just now, ...