Horror Short Story | The Door Crack

On the first day Shen Jing moved into his new place, he noticed a crack under the door, about a finger's width. He thought it was strange and looked down, but it was pitch black inside the crack, and there was nothing. The landlord said the old door was cut short and it didn't affect its use, so he didn't pay it any mind. That night, as he was sleeping, he heard a noise outside the door. It sounded like someone dragging something down the hallway, a rustling sound, slowly passing his door. He didn't open the door. The next morning, when he went out, he found a strand of hair stuck under the door crack. It was black and very long, tangled in the crack and couldn't be pulled out. He cut it off with scissors and swept it away. The next day, another strand appeared. He installed a security camera facing the door. That night, the hallway was empty on the footage, but a strand of hair slowly extended from under the door crack, as if someone was crouching outside the door and pushing their hair through the gap. He opened the door and rushed out, but there was no one in the hallway. He returned to his room and found the hair on the floor was gone. The door crack was still the same width, but there was a note underneath: "Your door crack is too wide. I watch you sleep through it every night." Shen Jing sealed the door crack with tape. That night, as he slept, he heard the sound of tape being ripped off, very slowly, as if someone on the other side was peeling it off piece by piece. He didn't dare to open his eyes. The next morning, he checked the door crack. The tape was gone, and another note was under the door crack: "If you seal the door crack, I won't be able to see you. So tonight, I'm going to squeeze my whole body in." Shen Jing hired workers to replace the door that very day. After the new door was installed, the crack was very small, so small that not even a piece of paper could fit through. He breathed a sigh of relief. That night, he slept