C70 Mu Yuncheng Save Me!

When she returned with her things, she found that the door, which had been open, had been locked from the outside at some point, and could not be opened no matter how hard she tried to push it open.

"Is there anyone?"

Su Ziling's voice went through the iron door and echoed in the corridor.

She pressed her ear against the iron door. She could not hear anything outside. It was terrifyingly quiet