KNY Demon Oneshots :D - Finished

Kaigyu hanahaki AU 2

AU: Hanahaki (Hydrangea)

Additional ships: Kokuzan, Doukaza

Timeline:

3rd person POV:

It had been a day since the game, and Muzan had finally managed to escape Kokushibo's seemingly endless hugs. Not that he minded, but he had to go talk to Gyutaro. He had seen what was happening to his uppermoon, and he was worried about him. Hanahaki was no laughing matter, in fact, it was one of the only things that could kill a demon. And as much as he wished he could say he only cared because Gyutaro was strong, he genuinely cared about Gyutaro and the other uppermoons.

"Gyutaro, open up," Muzan commanded, knocking on his door so hard it almost broke. With the intense knocking, the door swung open, revealing that Gyutaro wasn't in his bedroom, however even an idiot could tell that he was in his bathroom. "Gyutaro, let me in," the demon lord commanded once more. Gyutaro, who actually heard this time, quietly opened the door a tiny crack. "Oh, M-Muzan-sama, what... what are you doing in here?" Gyutaro nervously laughed. Despite Gyutaro trying to block the door, Muzan could clearly see the blood stained bathroom behind him. "I know about the Hanahaki."

—~~—~~—

Gyutaro and Muzan were sat on Gyutaro's bed, a large bowl in Gyutaro's lap. "Muzan- sama-" "Muzan." "Uh... Muzan, I... I'm sorry, I don't think I'll be of service to you much longer. I only got it yesterday, and it's already progressed really far... I'll probably only be alive another week, if that..." Gyutaro admitted. "I'll get Koku. He can see how far it's progressed..." the shorter demon decided. "Koku?" "Ah- Kokushibo I mean, haha how forgetful of me I forgot to finish his name!" Muzan  panicked. A small smile could be seem on Gyutaro's face. "I won't tell anyone about you two Muzan... I promise.

A few short minutes later, Kokushibo was there, assessing how far the Hanahaki had progressed. "Considering you only got the disease yesterday, it's progressed... alarmingly quickly. By the looks of it, it's a hydrangea, and it's grown a lot. I'd say you probably have six or so days, so you better confess quick," Kokushibo said, before closing his top two eyes. "I don't think he'll accept me," Gyutaro mumbled under his breath, before remembering of Muzan and Kokushibo's weirdly good hearing. He looked away, flushing. "It's Kaigaku, isn't it. I'll let you date him if he accepts, but you better take care of my kid, alright Gyutaro?" Kokushibo stated suddenly.

—~~—~~—

-The next day - Five days left for Gyu-

Kaigaku was in his bedroom, pacing. He wanted to confess to Gyutaro, but he didn't know how. He decided to talk to someone who knew Gyutaro well. He immediately ruled out Daki and Douma. They may be Gyutaro's sister and father, but neither of them could keep a secret. Best to tell Akaza, who was both relatively close to Gyutaro and also probably Douma's boyfriend. With that decided, Kaigaku pricked his ears, trying to hear where Akaza was. Although he did eventually locate Akaza, he also managed to 'accidentally' hear his father and Muzan fucking. He didn't mean to hear the fucking, but he did need the blackmail, so he quickly wrote it down and stuffed it in his blackmail drawer.

Once he reached Akaza's room, where he heard Akaza, he knocked on the door. The door opened to a sleepy Akaza in nothing but his underwear and one of Douma's hoodies. "Can I come in?" Kaigaku asked, deciding not to mention Akaza's outfit. He was answered by Akaza grabbing the front of his shirt and pulling him through the door.

"What?" the obviously sleepy Akaza asked. "Um... well, I have a favour to ask... IreallywanttoconfesstoGyutarobutIdon'tknowhowpleasehelpme!" Kaigaku said all in one breath. Akaza blinked, trying to comprehend what the fuck Kaigaku just said. Once it clicked in his brain, a confused look crossed his face. "Why are you asking me? Shouldn't you ask Daki or Douma? They're his family," Akaza queried. "Well, neither of them can keep a secret, and you're fairly close to Gyu, so I figured you could help! Also you're fucking his dad, so you'll probably be his other dad soon..." Kaigaku mumbled the last bit, but Akaza still seemed to hear, as his face turned almost as pink as his hair. "Sure, I'll help. But if you tell anyone about me and Douma, I'll tell Gyutaro for you." "Alright! So I was planning to do it in five days..."

—~~—~~—

Headcanons: (you get many today) Kokushibo is always the one who is asked to look at injuries, because he has transparent world.

Kaigaku has blackmail drawers.

Daki often looks through said blackmail drawers.

Daki and Douma cannot keep secrets. Like at all.

Kaigaku had similar hearing to Zenitsu when he was a human, but once he became a demon, he could control it even better.

Akaza steals Douma's hoodies.

Akaza and Gyutaro are actually kinda close.

AN: Hey guys! I am alive I swear! Here is part two to the Hanahaki au! I was thinking, maybe one day I could do a chatfic? Tell me your thoughts! Anyways love you all little moons!

-Koku

Space for YoriichiMuzansPTSD if they are alive (I am unsure)