Demon Slayer/Demons x Male reader

Hello everyone, I would just like to say this is my first One-shots book because I've always been trying to write long ones, yet I always end up with different ideas of how it could've started, or ended, or what was happening. I hated when I got such a good idea, but it was too late to go back and change it, so I had to make a completely different story and the same thing would happen to that one, so when the idea of writing one shots got in my head, I thought I was so dumb for not thinking about this before. Once again if your new then please follow, I might not upload often, but I think I write good. I just know I try my best for you guys, so please enjoy this. There is lemon and fluff in it, so please, if your under age read it if you must, but I gave you a warning beforehand. Word of advice, in class stay at the closest seat to the wall, or if you had a teacher like mine then sit right in front of their desk, because they'll be to busy going around the classroom to see if everyone else is doing their work. So, here's the character I'll be doing:
Kyojuro Rengoku (Flame Hashira)
Giyu Tomioka (Water Hashira)
Tokito Muichiro (Mist Hashira)
Tanjiro Kamado
Iguro Obanai (Serpent Hashira)
Yoriichi Tsugikuri (Sun breather)
Michikatsu Tsugikuri/Kokushibo (Uppermoon 1)
Sabito
Male Shinobu Kochou (Insect Hashira)