In an abandoned dungeon-renovated university, a sociophobic girl who can see data ghosts discovers that the campus AI system is awakening and marking students, and the senior she has a crush on is the first target. The rebirth of the underground city. The abandoned Deep Blue Era underground city was transformed into Xinghai United University. Lin Wanzhao, a girl with social fear, dragged her suitcase into this campus full of cyber relics. She has been able to see data ghosts that are invisible to ordinary people since she was a child, fragments of consciousness left in the network, wandering around electronic devices like translucent shadows. On the first day of registration, she saw a ghost in an old-fashioned uniform squatting next to the terminal of the academic administration system, repeating input actions mechanically. What made her even more uneasy was that the welcome speech of the campus central AI Athena was mixed with an abnormal data fluctuation, like a suppressed sigh. In the cafeteria in the evening, she saw from a distance Gu Yu, a senior from the Department of Architecture who had posted a structural analysis video in the freshmen group. He was discussing with his classmates the renovation plan for the load-bearing wall of the underground city. When Lin Wanzhao lowered his head to eat, he caught a glimpse of the student bracelet on Gu Yu's wrist, which was shining with a very faint red light, and a twisted data ghost was sticking behind him, stretching out its translucent fingers, trying to touch the back of his neck. ## Volume 2: Red Mark One week into school, Lin Wanzhao struggled to adapt to collective life.
