Part 1: Sick

After being trapped in the upside down, Will becomes corrupted, and his psychotic behavior and unhealthy obsession with his childhood best friend starts some actual problems

[Edit: I wrote this years ago, I have improved both as a writer and as a person since I wrote this. But I am autistic, and very hypersensitive, so please don't make fun of this or be mean about it, because I'll probably think you're being nice because I sometimes can't tell the difference.]