Name

I rented a cheap studio apartment, and the landlord only gave me one piece of advice: "After midnight, if someone calls your name from outside the door, whatever you do, don't answer." On my first night, I didn't take it seriously. At 12:30 AM, a voice suddenly came from outside my door. "Chen Yu..." It was my own voice. I thought someone was playing a prank and ignored it. A minute later, the same voice called out again. "Chen Yu, I know you're in there." I got chills all over and grabbed my phone to call the police. Just then, the voice outside the door suddenly became urgent. "Open the door quickly! I'm the real one!" I was so scared I covered my ears. The next second, my phone rang. The screen showed: Unknown Caller. I answered, and the landlord's terrified voice came through. "Did you hear someone call your name?" I trembled and replied, "Yes..." The landlord yelled, "Why did you answer?!" I froze. I definitely hadn't opened my mouth. A rapid series of breaths came from the other end of the line. "Listen, hide immediately. That thing can get in once it confirms you're inside!" Suddenly, the doorknob made a 'click' sound. The voice outside the door chuckled. "Thanks for telling me you're inside." I turned to look at the mirror in my room. In the mirror, it was me, standing at the doorway. And the real me was still sitting on the bed.