It is a funny parody of a well-known game. You will meet the anime girls which actually are not girls but robots with no souls and emotions. They are not totally evil but they can recklessly kill you with their boobs. Hide from them in the wardrobes and other rooms – use cameras to check where the robots are. Also, use a map to move to the other rooms. After 5 nights you will successfully come out of the building. It has many references to the original game, do not take it too seriously.