C1857 The Childhood Sweethearts Chapter the Suspect Chapter

There's only one key to open the roof door. And the only key had always been in Liu Jipin's hands. Usually, no one was willing to get close to that door.

Only the cleaners would go to the rooftop to clean on the 10th of every month. Liu Jipin would also open the door himself and close the door himself. The key had never left his hands.

Now that a zombie had suddenly appeared on the rooftop