I'm starting to work on the roleplay thread as of now, but here's a bit of info for those that have no idea what Corpse Party is that would help out understand the concept of the Corpse Party universe.

The place everyone in the roleplay will find themselves trapped in is the "Heavenly Host Elementary School," which is a school that was torn down in the year of 1975 but still exists in a whole different dimension due to the spirit of Sachiko Shinozaki. The twisted dimension surrounding the school is just a black void, cut off from the real world, Heaven, Hell, Purgatory, etc. So even if you die in the school, your soul will remain there forever. Usually the way to enter the school and the twisted dimension is an incorrect usage of the "Sachiko Ever After" charm, which explains why when you would wake up in the the school, you would have a small piece of paper with you. Though, just for the element to keep this as a Crossover roleplay, everyone will find themselves in the school without having to perform the charm in the first place. I'm not going to spoil why the paper is that important, but consider keeping it with your dear life. Due to how many people had been trapped there in the past and died, there are many spirits, with the majority of the spirits being hostile and malevolent. Most spirits would try to kill you while some and few sane spirits would try to explain the hopeless situation you are thrown into.

That's the overview of the basics, but the rest of it will be slowly be revealed in the roleplay itself.