There Is a Virtual World Deep in the Subway

Not all subway stations are connected to the market boundary. Only "old stations" that have been open for more than 30 years and have experienced major accidents (such as landslides and rail falls) have entrances. The entrances only appear between 1:00 and 3:00 in the morning (subway outage period). They may be in the form of a green light in the wall or an abandoned elevator that opens automatically. The interior is a "mirror-distorted version" of the city - there are abandoned subway carriages and familiar street signs, but the buildings will collapse randomly, and there are "obsession fragments" floating in the air (formed after death of people who had regrets in life, and you will see each other's memories when you touch them). At the same time, there are "ruin monsters" that feed on "obsession" (they look like blurry figures, and they will gradually lose their own memories if they are entangled). Chu Ming is a night shift technician of the subway maintenance team. Because he was lost in the old station when he was a child (actually he briefly entered the Ruin Realm), he awakened the ability to "hear the tracks" - he can predict the location of the entrance to the Ruin Realm through the vibration of the rails, and he can also understand the "whispers" of the Ruin monsters (knowing that their weaknesses are "obsessions during their lifetime..."