THIRD-PERSON POV:
"Run! Both of you." Megumi instructed as he pushed Y/n and Itadori out of the curse's way. Megumi's wolves also came in their direction. The rest of the body of the curse came crashing down onto the floor. Y/n covered her eyes with her hand to protect them from the cloud of dust that had arisen.As soon as the cloud of dust disappeared they saw Megumi in the curse's grasp. Megumi tried to use his cursed technique but to no avail as the curse just slammed him into a nearby wall. Megumi collided with the wall harshly as blood started to flow from his forehead.
"Megumi-kun!!" Y/n yelled out. She was about to step in between them when Itadori pulled her back.
All of a sudden, the curse jumped onto the wall where Megumi was lying. The collision resulted in a piece of the wall come crashing down. The curse jumped out of the building onto a rooftop, taking Megumi with it.
Megumi landed on the rooftop followed by the curse who jumped in front of him.
'Damnit! I can't think straight.' Megumi thought. He tried using his cursed technique but it didn't work as he couldn't focus. On the other hand, the curse kept getting closer and closer.
"Oh no, you don't!!" Y/n called out as she came flying through the spot in the building. She did a frontflip midair creating enough momentum to kick the curse in its face with great force.
'Guess the gymnastic classes I took are finally coming in handy. But that shouldn't be nearly enough to fight a curse.' Y/n wondered as she landed beside Megumi. She was quite confused as to how she was able to do that.
The curse cried out in pain and went to grab Y/n.
Y/n flashed Megumi a smirk and leaped onto the curse's arm that was reaching out for her. Megumi just sat there dumbfounded. 'Who the hell exactly is she?' He wondered.
"Catch me if you can!" Y/n exclaimed as she ran up the curse's arm and went in for another kick to the face. But the curse caught onto this as it whipped its arm around, sending Y/n flying into the air. The curse opened its mouth and watched Y/n fall right towards it.
AUTHOR'S POV:
"Oh, sh*t! I didn't think this through!" You cried out as you fell towards the curse. 'No no no! I don't wanna die this soon. I just got here!'
Now it was Itadori's turn to save you. He also jumped through the opening and landed on top the curse with a punch. The curse backed away and you took this opportunity to bounce off its body and land safely on the ground.
You heaved heavy breathes. You didn't know that fighting an anime villain would deplete this much of your energy.
After catching your breath you headed straight for the curse again.
'Why am I doing this again?! I just nearly died! Why won't my legs just stop!?' You felt a pain in your chest and your legs ached but you couldn't stop now. Not after you had found out that you could actually hurt the opponent.
The curse reached out to grab Itadori but he latched onto its arms instead. The curse lashed out its hand, making Itadori crash onto the floor and then threw him into the air.
Simultaneously, You kicked the curse's legs and threw it off balance.
"What are you idiots doing!? I told you both to take those two and run!!" Megumi scolded you and Itadori.
"You're in big trouble yourself!" Itadori yelled while still fighting the curse.
"You're in no position to say that Megumi-kun!" You retorted. You went in for a punch but the curse dodged it this time.
"Only curses can exorcise other curses! You're both gonna die!" Megumi clarified.
"You could've told us that earlier y'know!!" You yelled as you dodged a few of the curse's attacks.
"You're gonna die at this rate if we don't help!" Itadori made it clear.
Suddenly, the curse flailed its arm around unexpectedly and that caught you off-guard. The curse threw you into the nearby railing.
'F*ck! That hurts a lot!' You held your head as you felt a throbbing ache gnaw into your skull.
"Y/n!!" Itadori shouted as he moved towards your direction.
The curse saw this as an opportunity as it swung its arm around and caught Itadori before he could reach you. The curse raised Itadori above its mouth in an attempt to eat him and the cursed object at the same time.
During this move, Sukuna's finger flew up into the air but Itadori managed to catch it by his teeth.
"There is a way to save everyone!" Itadori declared. "All I need is some cursed energy, right Fushiguro!?" he continued as he flung the finger in the air with a flick of his head.
"Don't do it!!" Megumi warned but it was too late. Itadori had already swallowed the finger.
Within a second, Itadori blasted the curse's hands and arms open and effortlessly landed on his two feet.
The curse, now enraged, precipitously ran toward Itadori. But it was no match for what Itadori had now become.
With a simple lift of a hand, the curse's whole body burst open with its pieces flying in every direction.
Your head hurt like a bitch as if it was telling you to close your eyes and get some rest but you couldn't pull your eyes away from what was happening. You didn't expect this scene to be this intense if you experienced it first hand.
The clouds in the sky dispersed, uncovering the full moon which shone bright light onto the scene, revealing Itadori's figure standing still before the carcass of the curse that was once about to kill him.
But something was different. There were strange markings on Itadori's face and black tattoo bands around his wrists. Megumi sat there trying to process the events that had just occurred.
You, on the other hand, knew very well what had happened.
Sukuna had just been awoken.
*・゜゚・*:.。..。.:*・・*:.。. .。.:*・゜゚・* *・゜゚・*:.。..。.:*・・*:.。. .。.:*・゜゚・*
A/N:
Now it's getting interesting ( ͡° ͜ʖ ͡°). Enjoy the cliffhanger sweeties. ♡

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An Unusual Curse || Jujutsu Kaisen x Fem!Reader insert
Fanfiction"...maybe true happiness is when we are happy with ourselves..." ⋆ ˚。⋆୨ ʚɞ ୧⋆ ˚。⋆ Y/n is a simple high school girl who is bored with her normal everyday life. After facing a traumatic event, she finds herself myster...