C719 Blood-red Smiley

At the beginning, Wang Sheng's first reaction was that the mysterious man had found them and even snuck into Yun Yueyu's room to do something!

However, the moment he saw the drawing, he also saw a black waterproof pen beside the book. The pen's size was exactly the same as the drawing's!

The pen had been removed, proving that it had just been used.

A terrible possibility immediately surfaced