Weirdness Always Bothers Me

"Hey... Is there anyone... Help me... Hey..." The dilapidated tape recorder was still working, and intermittent low and strange sounds came from it. Bai Qi put down the tape recorder in his hand and looked around at the dirty and weird classroom. "There's trouble again... I'm really just passing by..." As he spoke, Bai Qi clenched the one-meter long knife in his hand, followed by some vague black shadows...