During the holidays, my roommates and I were the only ones left in the entire dormitory building. Late at night, he suddenly brought back an online dating partner he had never met before. The girl was silent the whole time, and the next day his roommate disappeared mysteriously. There were inexplicably yellowed dormitory rules posted on the dormitory door, and there was something strange between the lines. It was only after I encountered a strange phenomenon in the corridor that I realized that only by abiding by the rules can I survive.