Weird High Martial Arts: One Slap Leaves the Supernatural Stunned

When Zhou Yi woke up, he found himself in a classroom surrounded by unfamiliar faces. He wondered where on earth he had ended up.

Outside the classroom was a hazy, crimson world, and everything was unsettlingly strange.

What kind of world was this? A dream, or a parallel world, where the strange and monstrous beasts ran rampant...?