As Luo Ziling went upstairs, Yang Qingyin's room was locked.
He grasped the doorknob and twisted it, only to find that the door was actually locked from the inside.
Earlier, when he was talking with Ye Xiaoli downstairs, Yang Qingyin must have noticed.
"No way, you actually locked the door!" Luo Ziling yelled from outside, "I bought you some late-night snacks! Delicious little wontons and fruits."
He had just bought the wontons at the school gate, as he believed that the taste there couldn't be compared to anywhere else.
There was no response from inside, as if no one was there.
