Survival Behind the Door: I Have a Black Key

Sun Xia, an ordinary migrant worker, accidentally grasped a strange black key. The moment the key turned on, reality was torn apart and he fell into the [room behind the door]. Endless dark corridors, dangerous abnormal monsters, [upgrades] that can rewrite power, and key masters who hold power all appear one after another. There are no absolute allies here, only endless calculations and games. If you want to escape back to reality alive, you have to risk your life and deal with various forces. Don't believe everything you see. The cost of survival is far heavier than you imagine.