User suggestions surprisingly.

Yo someone suggested something new so I will add it in.

I haven't seen anyone use "monster Mesume" it might be cool or maybe "Welcome to demon school, Iruma-Kun!" As a demon and just going to a crazy school. - Reaper_X_7998

A wonderful idea hell we could even spin it around and add any other Race instead such as Yokai or hell maybe even fuse it with Touhou or Roserio Cross..

Could try a fanfic in Vivziepop world as an imp. I don't see much of these around and honestly the world as so much to offer. A thing that would be hilarious is yujiro hanma in other worlds, and just make him OP but in the most ridiculous way possible, like by the power of his masculinity. Komi-san and her class in another world. Make the MC a reincarnated if you want but it has to be Tadano-kun. Don't forget to start a real cult with Komi at the center. Get someone with Epictale Sans powers in Re:Monster and make him a super spooky skeleton I don't see much Re:Monster fanfic but honestly it has an evolutionary system I personally love. You can become fking anything! *Cough* STRONG WAMEN. PS: I loved the idea with the music and probably will use it some time if I don't forget. - Lazy_mf

Now why stop at Re:Monster with Epictale Sans and just put him anywhere really? Since his powerset is unique among Sans.