Douma angst, Many Part And Requests Are Allowed(Swap au, Uppermoon as hashiras)

.|ANGST again|.

Douma's eyes widened, Zenitsu and Kanao? They had nothing to do with this! He panicked, speaking before thinking, "Let the students go! J-Just turn me into a demon!"

Douma paused, clasping his mouth with his left hand, in disbelief of his words after he processed what he said. Muichirou smiled maliciously, "as you wish, dear Hashira." As he finished, he moved with great agility and fluidity, baring his claws, and digging it deep into Douma's neck.

Douma let out a sharp gasp, clutching his neck, the blood staining his hand. As he passed out. Muichirou wandered off, completing his desires.

After a while, Douma woke up, with his pupils as slits, and sharp teeth. He still remembered what had happened, guilt dawning upon him. He became the species he swore to destroy. His head tilted down to his palms, the sharp nails... then he saw a woman, who was reaping flowers, looking like she was in her early 20s, with such tender skin and a gentle face. Douma's salvated looking at the woman, now that he was a demon, he was blinded by the hunger and needing to survive on blood. Without another thought, he moved fluidly, graphing the woman by the neck, she screamed in horror. Her neck bleeding, and soon snapping with a crack, as she slumped. Douma bit into her forearm, nibbling on it, enjoying the taste.

After he was full, and what was left of the woman was just her head. Then he came back to his sense, and looked guilty, almost nauseous as he quickly ran away from the scene... His crow had seen all of this...

[BACK TO THE HASHIRAS ESTATE]

Hakuji had gotten significantly worried that his coworker Douma was away for so long, the other hashiras were also noticing the lack of a presence there.
Then Muzan spoke, "We were misinformed about Douma's mission, the demon he was sent to kill was not a low rank, it was uppermoon-"

He got cut off by a croaky caw, "CAW CAW, DOUMA, HAS ENCOUNTERED UPPERMOON 4!!"

Hakuji's eyes widened, as the other hashiras looked bewildered and concerned for their dearest friend. Muzan quickly ordered sternly, "Hakuji, go search for him. Now."

Hakuji gave a nod, and quickly running off. After a while, he found Douma, his silky gray hair and red haori!

"Douma!!" Hakuji called.

Douma didn't respond, instead he looked back at Hakuji, with blood stained  in his teeth and dried blood staining his mouth. Hakuji stopped running, stumbling a bit from his own sudden stop. He looked at the sight before him in disbelief, seeing the person he had worked with for so long, had fangs and pupils as slits.

"Y-you..." Poor Hakuji couldn't muster up anything, looking at Douma.

Douma tensed up, flinching a bit when he saw that the person was Hakuji. He took a sharp inhale, as he backed away. Before he saw Hakuji reach for his katana.

Hakuji wanted Douma to get vulnerable but not actually kill him, even though he had too...

But Douma took it the wrong way, and the demon blood in him pumped as he suddenly attacked Hakuji.

Hakuji gasped as he jumped backwards and slashed towards Douma. The newly transformed demon quickly regenerated, now fighting ferociously now that the other had attacked. Hakuji had no choice but too fight, before he yelled, "DOUMA!! COME BACK TO YOUR SENSES!!"

But that didn't seem to waver douma, as they continued to fight. Hakuji was significantly weaker than him, but he kept up well, despite lacking. They fought until sunrise, Douma was about claw Hakuji's face, before he noticed the earring Hakuji was wearing, a snowflake... His eyes dilated remembering the memory when he gifted Hakuji snowflake earrings for his birthday. Suddenly tears stained his eyes, as he stepped back, abruptly stopping. Hakuji huffed, a bit surprised but relieved that he stopped attacking..

"I'm sorry..."

Douma mumbled, over and over again. Before he started burning in which he let out a scream, as he was unaware if the sun rising. Hakuji dropped his katana as he tried reaching out for Douma, but it was too late. He was burnt halfway, some of his skin falling apart.

"Douma!!" Hakuji practically shouted, grabbing Douma and wrapping himself around him.

"Hakuji... please take care of Kanao and Zenitsu..." Douma murmured weakly, taking the snowflake hair clip off, and offering it to Hakuji.

Douma then soon turned into burnt ashes, and Hakuji was left with nothing but his hair clip. He couldn't cry, he looked so stoned from shock and sadness, he couldn't even move. As the sun rose up fully, glowing irradiantly.

___________
Zamn that took long
Hope y'all enjoy the story!

Word count: 1411 (excluding the words after the ending line)