C54 The Blood of the Corridor

When I heard the sound, I ran out with my feet bare and I didn't have time to put my shoes on and opened the door, and the lights in the hallway were off, except for a spot I opened the door and there was nothing.

I walked to the corridor at the entrance and shouted, "Lee Wa!" The corridor was very quiet, and there was no sound at all. Could it be that I heard it in my dream just now?

Thus