Trapped in a Rule-Based Horror Game from the Start: Turns Out, I'm the Rules

Synopsis: Rule-based horror + supernatural thrills + mystery and deduction + Infinite Flow + passionate growth

Qing Yang is in evening study when a mysterious text suddenly arrives.

[Always remember: the teaching building has exactly five floors. There are two flights of stairs between each floor, for a total of eight flights.

If you see any extra flights of stairs, do not go up or down them. You cannot know for sure whether they are really stairs.]

[You will not hear a dog barking, and neither will anyone else. If someone else hears it and you do not, stay away from them, because it has nothing to do with you.

If you hear it and no one else does, you must stay in the teaching building until the sun rises the next day!]

The teaching building only has five floors to begin with, so why must I always remember that?

What are these extra stairs supposed to be?

Dogs aren't allowed at school, so how could I hear one barking?

And even if I do hear it, what does it mean if nobody else does?

One bizarre rule after another, one supernatural incident after another, and strange animals roaming the teaching building.

What kind of world is this?

Qing Yang patiently pieces together the clues, step by step. But just when he thinks he has figured it all out,

a girl appears.

“Qing Yang, let's meet again. I'm your girlfriend.”

?????