What Do You Mean, It's Just a Dream? What Are You Trying to Do?

I stupidly went exploring the “Dead Man’s Fifth Floor” with my classmates, and the red string and bell really did attract something nasty! The stairs turned into a ghostly loop, and hiding in the classroom was even more terrifying: the whole class turned to stare, their faces missing eyes and sporting only two black holes! I woke up screaming, drenched in cold sweat. Thank goodness it was just a dream!… Wait! Why is that same red soul-summoning string from the dream hanging around my neck?! There’s a scream and a thud from next door. The milk in my fridge has turned into slugs. At four in the morning, someone knocks on my front door… and the digital clock is flashing “GOOD MORNING”! The [Nightmare Defense System] activates! Only then do I learn the truth: the supernatural can’t kill people in reality, so it drags them into dreams to claim their lives! The red string around my neck is an invitation to death.