Au: gundam is a demon, hajime is the winter or snow hashira

Gundam is upper moon 1 and junko is the demon queen

Chiaki is upper moon 2

Sonia is upper moon 3

Kazuichi is upper moon 4

Nagito is upper moon 5

Mikan is upper moon 6

Ibuki is the music hashira

And for those who dont know demon slayer (BEST ANIME I'VE SEEN I HIGHLY SUGGEST IT!)

The demon slayer corp is the corp that hires demon slayers after they are trained

A hashira is the highest ranking in the corp

A breathing technique is a fighting style

Mizunoto is the lowest rank

A tsuguko is someone trained under a hashira

And makoto is the master and leader of the demon slayer corp

A black haired demon was feasting on the corpse of a mizunoto rank demon slayer "ugh... I got blood on me." He said angrily then he felt a strong presence, it intimidated him slightly so he got and used his scarf to break all the trees around them until something hit his back, as if it kicked him "now I see the problem... Your an upper moon" a soft voice said "another slayer-" he noticed it was a hashira, he blushed a little seeing the hashira.

A light brown haired boy with green eyes and a kimono that had snow flakes on it and the uniform of the demon slayer corp. "The newest hashira. Yes I've heard of you." "Really? I guess im popular and i've heard of you! Your gundam tanaka, upper moon 1 and the demon queens favorite demon. Your blood demon art involves your scarf and demon animals. You became a demon 1 year ago. And became a upper moon on the 12th" 'How does he know that much?!' The demon questioned himself in surprise "I know every upper and lower moon quite well! Impressive right?! Thats one of the reasons I became the tsuguko of the former winter hashira! Cool right?!"

The boy smiled brightly and proudly which made the demon blush more 'hes kinda cute... NO GUNDAM STOP IT YOU MUST KILL HIM.' Then he noticed the boy was gone but he dodged a close attack after hearing "snow breathing, 1rst form, winter storm" but after dodging it the side of his neck that was almost slashed was covered in ice "your quite fast! What amazing speed!" The hashira praised the demon as he came running up to him again

'snow breathing 2nd form, freezing blizzard' ice came from his light green sword and after not being able to reach his neck after his attack was dodged again he was only able to slash the demons arm but it regenerated quickly and he was punched in the arm to back him up

"Blood demon art... Rising soul hands" a bunch of hands came from the males scarf and went at hajime and somehow caught him and pinned him to a tree "wow! You actually caught me-" he was going to continue until he felt something...

A KISS?!

It lasted 2 minutes, the demon noticed he enjoyed it and so did the hashira until the both remembered something

"Kill all demon slayers you come across and hashira are your biggest enemy, bring me their heads!" Gundam remembered the demon queen, junko enoshima saying from when he first became a demon "kill all the demon slayers, hate them with all your being!" She said smiling as he was on one knee "yes enoshima sama"

"Demons are horrible beings, hate them. Kill them. They killed your family, get your revenge. Show no mercy." Hajime remembered from when the former snow hashira, enko misano said to her tsuguko "yes master..." "Show them no mercy like how they showed your family no mercy."

Hajimes sword slashed the fabric hand and kicked the demon away who was about to move away and they both covered their mouths as the blushed "WHA- why- huh- I WHY DID YOU KISS ME?!" the hashira yelled "i- I don't know... It was like I had to.." (You did hes your husband idiot 😑) "i-i enjoyed kissing a demon i- I master told to hate demons not love them or kiss them!" Hajime said as he freaked out while gundam stood there with pure confusion and anger "why did I do that... I dont love him... We just met and he's my biggest enemy, a hashira...!"

They both then started to stare at each other "I... Enjoyed it.." They said in unison until then

Gundam...? Did you just... Please... Gundam

Hajime... Please tell ibuki you didn't you didn't

THE MASTER/JUNKO SAMA WILL FIND OUT!!! THEY HAVE TO KNOW!