Community Notice: Do Not Open the Door After Dark

The story begins with an A4 piece of paper posted on the bulletin board of an old community. Never open your door to anyone after dark. It is prohibited to feed stray animals in the community. At first, everyone thought it was a silly prank. Until the first night came, the entire community was cut off from power and internet. Urgent calls for help from friends and pleading from strangers came from outside the door... And those neighbors who opened the door out of kindness or carelessness would disappear quietly the next day. This is no simple ghost story. This is an extreme puzzle game where life is the bet. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.