Basically what I'm thinking is that theres a group of monster kids. Anyways, yes they have extra appendages that make them look different, but they always had a way to hide them and live on as humans. As time goes on the kids get more revealed and turned away by others, other then their own kind so they grow bitter and enraged and do their own little things to create a little havoc. These kids think they no one would love them for who they are so they tend to be untrusting to humans, so they stick to their own. With the help of an unknown benefactor (which i still haven't figured out) who happens to be a monster himself easily gaining the trust of the kids and promising them a safe haven away from their pain. Since he/she had no extra features to them they could easily blend in as the principal of a human school and selecting a few students, promising an island vacation in a competiton, although hearing said rumors of these monsters causing chaos. Bringing both groups to said island, this program is to help the monster kids understand that they could be loved if they weren't so busy terrorizing humans, and show that some will accept them. Also a lesson to the human children to show that even if they are different there are just like them, they breathe, they bleed, they cry just like humans do. Though first few days ought to be bumpy ones right?
Kinda the basic idea if you get it, idk if people will be interested this is my first RP and hope people will join ><