NEED HELP FINDING!!

there was this one spicy bl oneshot/short story where a guy was on a vacation and looking on a dating or one night stand app and he met with the guy he matched with but they were both doms so they decided not to do it but he found out that the same guy he matched with has some personality disorder (im not sure) so there’s like something to do with one of his personalities/self being a dom and the other one a sub

i don’t know if this makes sense and i feel like there are red herrings in there as i read this a while ago but if someone could figure out what’s it’s called and link it or tell me the name of it