!!!Jujutsu Kaisen Canon story spoilers ahead, read at your own risk!!!

It was the day of the Kyoto Goodwill Event, everyone was putting everyone was introduced to each other, why the Tokyo team where planning on how to win, the Kyoto team were tasked with killing Natsu due to him being Sukuna's host, while most of them were on the same page only Aoi Todo wasn't, he didn't care about what they wanted and wouldn't take orders, he felt an urge to fight against the dragonslayer; once the event started, they all split up in their own group though that left Natsu alone, which he anticipated seeing as he was already a target by the higher ups, so he thought ahead of them. 

"So, how are we going to do this?" Natsu asked. 

"Simple, we can kill you fast if you make this simple" Kamo said. 

"There's no escape" Mai said, as Natsu chuckled a little. 

"You're about to die, yet you laugh" Mechamaru said. 

"It's funny how you all think you can kill me is all" Natsu said. 

"I commend you for your bravery" Kamo said. 

"Question, have you ever faced a man who has the magic to kill a dragon?" Natsu asked. 

"Don't be ridiculous, there are no such things as magic or dragons, all a fairy tale" Mai said. 

"Then you all got sent to your death's" Natsu said, a smile pulled on his face. 

"Everyone fall back" Kamo said, as Natsu exploded in a pillar of fire and cursed energy, before inhaling. 

"Cursed Fire Dragon's Roar!!!" Natsu roared, blowing out black, red and orange flames out of his mouth; though the Kyoto team got out of the way fast enough. 

"I-I-Impossible, where would someone learn such a thing?!" Mai said. 

"They left out a bunch of info" Mechamaru said. 

"Isn't that Salamander?" Kasumi thought. 

"You can't hide forever" Natsu said, before charging at a tree and punching through it using Fire Dragon's Iron Fist, the hand just a few centimeters away from Mai's head. 

"Scary" Mai thought, as Natsu was about to kick down the tree but got hit in the face by Aoi. 

"I knew it, the place with the most action is where you'd be" Aoi said. 

"It's you, I thought you weren't going to kill him" Kamo said. 

"I'm not, I'm here to see if he's strong" Aoi said. 

"Do kill him if you have the chance"Kamo said. 

"Don't ever order me around" Aoi said. 

"Salamander looks so cool" Kasumi thought, as she and the others looked for the Tokyo group. 

"I won't lie, that was a clean hit and a head one at that" Natsu said. 

"I can feel your strength, so before we start, what's your type of woman?" Aoi asked. 

"My type of woman?" Natsu asked. 

"Yes, mine are tall women with big breasts" Aoi said. 

"You've got to be kidding me" Natsu thought. 

"Well, I already have my sights on this one chick, she is tall as well as has a big butt and big breasts" Natsu said. 

"I knew it, you're an interesting person" Aoi said, with a grin and charging at Natsu, who charges as well and they're battle commences; Natsu jumps at the bigger male, Aoi throws a few punches that Natsu dodged without much effort, taking the close proximity of their bodies as an advantage, he knees Aoi in the face and then kicks off of his body. 

"This guy gives off Laxus vibes, but a better version and he's thinking of his next move" Natsu said to himself, before going wide eyed, feeling Aoi behind him. 

"You're wasting time thinking, best friend" Aoi said, as Natsu turned around and formed an X with his arms to block the kick, upon receiving the attack, the dragonslayer was sent flying away into a bunch of trees, but he got his bearings quickly. 

"You're strong, but it all changes now" Natsu said, charging at Aoi as they exchange blows, the speed was unbelievable to the human eye but it was definitely interesting for the teachers to watch. 

"That new member of yours is truly interesting" Utahime said. 

"Of course he is, I picked him though he doesn't seem to like it here" Gojo said. 

"Why would he? You did kidnap him" Utahime said. 

"It's not that, oh well, oi old man how are you liking the outcome?" Gojo said before asking. 

"It is truly interesting" Gakuganji said. 

"They had not mentioned his use of magic, or did Gojo know what we were trying to do to the young man" Gakuganji thought, as the event continued for sometime only for Intruders to pop up and cause wide scale damage, putting up a screen as well. 

"Do you feel that best friend?" Aoi asked. 

"Yes, and stop saying that, we've never met before" Natsu said, as they both head for where Fushiguro, Kamo, Maki and Toge were, only to find Fushiguro with a plant growing out of him, Toge with dried blood around his mouth, Kamo hardly keeping up with the special grade cursed spirit and Maki about to die. 

"So this is what is causing all this ruckus" Aoi said. 

"A living tree, this is gonna be a problem if he has backup" Natsu thought. 

"Then let's finish this fast" Aoi said, as they both charged past Kamo, surprising the male and Maki that they were suddenly there, before they both connected blows with the cursed spirit sending it flying into the forest. 

"For a cursed spirit, you're really ugly" Natsu said. 

"Be careful, he's much more trouble than it seems" Aoi said. 

"The earth, it cries, it cries because of what you humans do to it, how long will it be till you call change, a hundred or thousands of years, I cannot allow that, so here and right now I will make you into greater beings for the new age of the earth" Hanami said. 

"A plant lover, huh" Aoi said. 

"And I thought vegans were a problem" Natsu said. 

"Then let's move fast, I believe you have a technique you wish to use right?" Aoi said before asking, as Natsu nods. 

"A bunch I've been working on, now I know what to do so let's kill this bastard" Natsu said. 

"Prove it" Aoi said. 

"My pleasure" Natsu said, lighting his arms and feet on fire. 

"Fire? You are the worst kind of human there is, do not worry for you shall see the errors of your ways" Hanami said, as Natsu channels cursed energy into where his fire is. 

"Cursed Fire Dragon's Consecutive 6" Natsu chanted, charging at Hanami at high speeds. 

"1" Natsu said, punching Hanami in the gut, sending the cursed spirit flying, but the dragonslayer appeared where the spirit was heading. 

"2" Natsu said, delivering another punch but to Hanami's face, sending the monster flying again. 

"3" Natsu said, clenching his hands together and swinging at Hanami, sending the monster flying through a bunch of trees. 

"4" Natsu said, kicking Hanami into the air. 

"He's faster than I anticipated, he's far much more powerful than I thought" Hanami said. 

"5" Natsu said, reeling his arm back and punching into the ground. 

"6! Cursed Fire Dragon's Roar!!!" Natsu roared, blowing out fire from his mouth burning away at the spirit but that didn't kill it; jumping back, Natsu cracked his neck. 

"How was that?" Natsu asked. 

"Truly impressive, none the less from my best friend" Aoi said, as they high five. 

"Then, let's finish this before it can even go any lo-" Natsu said, but was cut off when Hanami grabbed their faces, jumping forward, dragging them through the forest ground, before throwing them into more trees. 

"This is troublesome, but I have decided to get serious" Hanami said, displaying his new black arm and a flower on the shoulder of that arm, as they two stood up something surprising happened as Natsu seemingly pulled out Sukuna's power. 

"Sukuna? Could he be coming out to fight, I could appeal to him and get him into a binding vow" Hanami thought. 

"Natsu, what has happened to you?" Aoi asked, standing up and feeling the unrealistic amount of cursed energy pouring out of him. 

"What do you mean?" Natsu asked, before looking at his hands. 

"This is weird, it feels like I'm in control but I'm using his power" Natsu said, clenching and unclenching his hands, as Sukuna pops up. 

"This kid is different, it's like we were meant to be" Sukuna said. 

"I could get used to this" Natsu said. 

"Indeed" Sukuna said. 

"How do you feel?" Aoi asked. 

"This is the first time this has happened, I'm not sure how to describe it" Natsu answered. 

"I knew it, the boy is nothing but trouble" Gakuganji said, feeling Sukuna's presence. 

"Yet, he's in control" Gojo said, feeling Natsu's presence much more. 

"We must exorcise him now" Gakuganji said. 

"You will do no such thing under my watch old man" Gojo said, as they had a staring contest but then the screen that was there started going down signalling the cursed spirits that they had to retreat. 

"It seems my time has come, until ne-" Hanami said, but Natsu appeared in front of him. 

"Don't think you're getting away that easy" Natsu said, grabbing Hanami by his face and slamming him into the ground. 

"Unbelievable, he even left an afterimage" Aoi said. 

"C'mon, get up this is no fun" Natsu said, with a bored look, as Hanami got up but backed up. 

"Mahito, where are you?" Hanami thought, as Natsu hops up and down a little while changing the leg he hops on with his hands in his pocket. 

"C'mon, c'mon, you're boring me" Natsu  said. 

"Sukuna-dono, you should come with me, let's go back and bring forth the world that is paradise for us curses" Hanami pleaded. 

"That would be fun………." Natsu said, before a second passed and within that second, half of Hanami's upper body was gone, that section in Natsu's hand which he burned to nothing. 

"But I'm not Sukuna, it's Natsu" Natsu said, flashing the cursed spirit a grin that was scary to Hanami, but then a black portal opens and Mahito shows up. 

"Ah, Sukuna is here, I would love to stay but I have somewhere to be" Mahito said, grabbing onto Hanami, though Natsu was fast enough to get in their face and punch the tree spirit, sending the two flying into the portal but the patchwork spirit drops 3 of Sukuna's other fingers. 

"Now this is much more interesting" Natsu said, picking up the fingers and throwing them into his mouth, then the effects hit him hard causing the male to grab at his chest and shake violently just as Gojo shows up. 

"What happened?" Gojo asked. 

"Natsu seems to have tapped into Sukuna's power without changing, though he was in control which I believe would be a good thing, though the cursed spirits escaped but they dropped something he ate" Aoi said, as Natsu then stood up like nothing happened before burping. 

"That's so fucking nasty" Natsu said, as the markings on his face disappeared. 

"Yo, how do you feel?" Gojo asked. 

"Alright, normal actually, I'm surprised that it even happened" Natsu said. 

"I felt the same, but with the time we have, we'll just have to try bringing that out and do our best to understand" Gojo said. 

"I'm sure Natsu can do it again" Aoi said. 

"Yeah, so what about the event though?" Natsu asked. 

"Ah……….I don't know" Gojo said, waving off the event. 

"Eh?!" Natsu and Aoi said.