~Flashback~

"Listen and listen close brat."

Yuji glares at him as Sukuna leans forward, his chin resting on the back of his hand. "If you want to keep Y/N safe, we need to make a pact again."

"Again? I didn't make a pact with you? And what's up, you know something I don't?"

Yuji is still hostile toward him which made Sukuna roll his eyes. "You're just as stubborn as that stupid Spartan," he comments. Yuji raises his brow in confusion. "Spartan?" 

"The tale Y/N was telling me about, Kratos." 

"Kratos? Hold up when did you and Y/N start talking?!" 

"We've been talking for a while now," Sukuna hummed, enjoying the tormented look on Yuji's face. "If you hurt her again," Yuji snarls, glaring at him. 

"Now why would I hurt my fiancé?" 

"...your what!?" Sukuna rolls his eyes, this shouldn't take this long. "Listen to me idiot, there's a bigger threat coming, I need you to agree to this pact." Sukuna appears in front of him and quickly blocks the oncoming punch from Yuji. 

"Like hell, I would! You're pure evil!" 

"An hour, give me an hour."

"No!"

"59 minutes."

"Fuck no." 

Sukuna grew irritated. He reaches out, gripping him by his shirt, and yanks him close. "Dammit kid if you don't let me have free reign Y/N is going to die!" he growls. Yuji looks taken back and before he could question him Sukuna continued speaking.

"That curse energy residing in her is dangerous, the more she uses it she becomes a curse or maybe something more dangerous. More dangerous than I, it's not something a human can handle. A god is pulling the strings behind all this and for her, I am willing to work with you to stop him." 

Yuji stares in shock and Sukuna lets him go. "Give me free rein as long as I need it and I will not harm anyone else." Yuji opens his mouth and Sukuna holds up his hand. "And I won't do anything devious that will hurt your precious friends." 

Yuji went to speak again and Sukuna cuts him off once more.

"And I won't plan any evil plan."

"Will you at least let me speak!" Yuji shrieks. Yuji grips his hair, weighing his options then looks back up at Sukuna. "So...you two are together? But that wouldn't be enough time! You didn't take my body over that much!" 

Sukuna sighs, getting annoyed by his questions. "Sometimes I bring her in here, or I would speak to her in her mind."

"She never told me this...did you  force her to not tell me any of this?"

Sukuna opens his mouth to say yes, but then he stops when he realized he never forced you to not tell anyone. Well shit, if you had figured that out you could've run to tell this idiot. 

"Actually no, she might have felt forced, but now that I think about it I never told her she couldn't tell anyone."

Yuji groans, feeling a whirlwind of emotions. It is starting to make sense as to why he would find himself in odd positions whenever Sukuna took over. Even blanking out at times. And you would explain he didn't try to kill you and you two would just talk. 

He feels hurt that you didn't trust him enough to tell him about this though.

"Oi don't start sulking now, are you going to agree to this pact or not?" 

"Just give me a second, you don't get to spring this on me and act all fine and dandy!" Yuji snaps. Sukuna waits for one second before grunting and gripping his hair. "Dammit, Yuji I just-"

"Wait did you just call me Yuji?"

Sukuna blinks and groans, gripping his face. "Dammit, she is rubbing off on me," he grunts irritated. Yuji watches him for a few seconds before coming to a decision. "Alright, I agree to this pact, again you cannot hurt my friends, and innocents, and keep her safe."

"Yes, yes finally this all could have ended sooner if you just agreed to it." Sukuna turns his back to him and Yuji started thinking.

"So like...you two don't get freaky in here do you?"

Sukuna smirks and doesn't answer him as he heads back to his throne. Yuji's face turns red and he starts yelling. "Gross! Why!? Why can't you wait until you're outside of me!? Get your own body to get freaky inside!" 

"You'll understand when you get a girlfriend of your own."

-

"Love."

You blink and turn to Sukuna who keeps his eye on the stranger. Sukuna turns around and looks you in the eyes. "He's dangerous, remember that," he starts. "I want you to be careful and if you need to run then run." 

He uses his hand to rest on your head and brushes his fingers through your hair. 

"He brought my brother here, I want to see his head mounted on a wall," you hissed. "I will kill him." Sukuna's expression slowly changes into a wide grin. "I love seeing this side of you darling, whatever my queen wishes I shall grant." 

You clear your throat, blushing from calling you queen, and hold up the three fingers you collected for him. "H-Here, these may help." He has a wide grin and he happily eats his fingers. 

He grins evilly as his veins pop out and if possible his teeth sharpen and his claws grew. His second pair of eyes grew wider as well as he stares at Chaos. 

"It's been a while since I ripped someone open, I'll enjoy tearing you apart." 

Chaos just grins back at him, having an insane look. "You're going to try to kill me? You two? I look forward to it, it's been a while since I had a good fight."

You feel Sukuna's hand reaches up to your nape and grip the corner of the seal. You immediately turn to him and slap his hand away. "No, we don't know how dangerous I could become," you said, afraid.

"We might just need that."

Chaos hovers his hands above each other, forming a powerful energy ball. He shoots it in your direction and Sukuna holds out his hand, making the energy deflect around you. The energy did cause a great deal of damage around you, but you two remain unscathed. 

"Is that all you got?" Sukuna asked, smirking.

Chaos hummed, cracking his knuckles. All three of you move towards each other. Sukuna throws his punches and lets out an insane laugh as he swipes at Chaos with his claws. You aim for Chaos's lower body, hitting him in the waist. 

Chaos blocks Sukuna's attack and hits him square in the jaw. Sukuna stays in his spot and uppercuts him in the jaw.

You and Sukuna found a rhythm and even kicked him away at the same time.

Chaos grips his chin as he stumbles back. Annoyed, he forms a long sword and rushes your way, blade in the air. Sukuna tosses you in the air before he could slice at your chest and blocks the attack that would have hit you had he not thrown you. You quickly imagine a sharp object on the back of your heel as your body flips forward. 

The back of your heel slams into his head, making him stumble forward. Sukuna takes the chance to swing punches and blocks a punch Chaos threw. He uses some force to push you both back and smirks. You hover in the air and get ready to land until Sukuna catches you and sets you beside him.

"Is that all you got-"

Chaos starts talking but stops when he feels something wet drip down his head. He reaches up and touches the sticky substance. His eyes widen when he sees blood on his fingertips. He looks up, Sukuna having a smug look while you have a panicked expression.

"You...actually damaged me?!" Chaos spoke in disbelief.

Immediately the earth started shaking and you grab onto Sukuna to balance yourself. "I thought gods don't bleed," you mutter to him as you watch Chaos lose his mind. Sukuna looks at you, having a proud grin. 

"Darling, did you forget that he gave you those powers? That curse energy?" That's right he did, but what does it have to....?

Your eyes widen in realization. 

"Sukuna!" you said surprised. He presses his index finger against his lips to tell you not to say anything. Because Chaos gave you his powers, he's fighting against his power. But if that's true, maybe you should. Your eyes trail behind you as you feel the seal move against your skin.

"You got lucky kid!" Chaos laughs, grinning in your direction. "Looks like I misunderstood how much power I gave you!" 

The two of you got pushed back by this man, who has a grin on his face. The two of you get into your battle positions before charging toward him. Sukuna leaps into the air as you slide on your shins, ignoring the burning pain. Your punches come into contact with his arms as he holds them up to block your attacks. 

You pull out a reference as Sukuna did some kind of move and a large cut slices up Chaos'es back!? "What the-?!" you said, shocked. Chaos falls to his knees as Sukuna has an evil smile plastered on his face. A huge energy bursts around him, shoving Sukuna and you back father, thus also separating you and Sukuna.

The God of Chaos uses his power to form large hands and dig through the earth then throws a giant boulder your way!? You gasp, knowing you're stuck. It was huge, you couldn't leap out of the way in time! You let out a terrified scream as it gets closer to you. But before it could crush you into the earth Sukuna appears in front of you. His arms wrap around your body as the boulder lands on top of you.

You screw your eyes shut as your body is colliding with him and the earth underneath you. His hands are protecting your head and pressing you close to him to minimize as much damage as he can. 

You scream in pain when you feel your right leg being crushed and ground under a huge amount of weight. Everything is dark and you feel short of breath as you can feel Sukuna shift above you. 

"Oh my god, oh my god!" you panic, almost screaming.

"Y/N calm down," Sukuna growls. 

"No, no, no you don't understand being buried alive is not the way I want to die!" You yell in pain when your right leg is twisted at a painful angle, it feels like it's going to snap in half. "I shouldn't have watched those cave exploring gone wrong videos!"

Your eyes catch the movement of something bright red, making you look up. His bright red eyes stare at you, all four of them. "You're not going to die this way," he spoke, his voice hard. "Just need to get a good grip."

He removes his hands from you and begins feeling in the dark with the boulder on top of him. You couldn't move much, the only thing you can move is your arms. The sound of the earth moving around, caused you to scream in fear and hold onto him. Or well you tried to. 

"Sukuna if I die make sure to play my entire playlist at my funeral!"

"That's a pretty long funeral."

"Ayo look before they burn my body or bury me, I wanna go out in style-OW SHIT! Is this what death feels like?!"

"Y/N, if you were going to die I'd rather you die with me rearranging your guts." 

You hear him grunt and shuffle a bit as you're at a loss for words. Until you burst out laughing, either from what he said or from anxiety. It was pitch black that you didn't see Sukuna smile. He didn't need you panicking at a time like this, so he'll do whatever it takes to try to keep you calm.

Even if it is dirty talk.

"Do you even know what that means!?" you laugh. "With you, I'm not sure if it means you'll impale me and rearrange my guts or you'll fuck me and rearrange my guts that way." 

"I prefer the good old way of pinning you down and fucking you until you beg me to stop. And I won't stop." 

You clear your throat and hear the shuffling of rock around you. This made you scared and your hands grab onto his shirt. When he adjusts the boulder on top of him, it unnaturally twisted your leg. 

"AH!" you scream out, gripping your thigh. 

"I'm sorry," he whispers. 

"Oh god when I picture you on top of me I wanted to be screaming in pleasure, not screaming in pain and having the risk of my leg coming off!" you cried. The sound of the earth moving fills your ears as well as him grunting. "Exactly how many times do you imagine having sex with me?" he asked. 

"Too many times to count love," you whimpered. You know what he's doing, he's trying to distract you and keep you calm. It's working though somewhat. 

You hear him laugh and hear shuffling movements. You try to stay calm as if you are not going to be crushed to death. Your breathing does get shallow as you start panicking again. "A-Am I going to lose my leg?" you asked. "You know I think I'd be a cute pirate, getting a wooden leg and all that."

"You're not going to lose your leg, even if you do I'll use my techniques to grow it back. But it won't be a fun process." Sukuna finally has a good grip on the boulder. "I imagine so when you're growing a limb," you mutter, feeling light-headed.

"I have a good grip, hold on." Sukuna grunts and lifts the boulder off of him. Your eyes adjust to the sudden light as he helps you out of the hole. Chaos is gone and the other veil that trapped the school was lifted as well. As you are in his arms he frowns in anger when he sees the state of your leg. 

"Ow!" you hiss, gripping your thigh. 

Yeah... sometime during the whole moving the giant boulder your leg was grinded off. All there is a stub. "My leg is gone, it's gone," you said, breathing heavily, trying to not panic. You feel lightheaded as you see blood spurt out of your thigh.

"Besto friendo!"

Without a second thought, you feel yourself in the air and then back on the ground so quickly before you could say, sweet Jesus. You look around and see trees surrounding you instead of the small opening you two were in.

"Huh!? When did we get here!? Eh?! Eh!?" you said, panicking. Sukuna is carrying you with one arm as he lets you do....whatever movement you're doing. 

"I don't want people interrupting us," he spoke. "Repairing your leg is going to be gruesome progress." You look down at your stub and you sigh, gripping your thigh as it pulsates in pain. 

"It hurts so much," you whisper, trying to keep on a brave face. 

You're surprised you're not bawling or screaming. Maybe the adrenaline is still in your system preventing you from feeling too much pain. He sits down, placing you beside him. Your stubbed thigh is sitting on his lap and you feel the pain growing worse. His hands hover over your thigh before slowly lowering. 

"Okay wait that hurts!"

"I didn't even touch you yet."

"Okay go. No, no wait! Okay, okay, I'm ready. No wait just let me brace myself! Okay! No wait don't touch me it hurts!" He raises his brow as his hands did not move at all. "Rabbit I didn't even move an inch in that entire rambling." 

You just turn and hug his arm so you won't see the process. It's probably better if you don't watch him fix your leg. "Okay go," you spoke, your voice shaking. Gripping onto Yuji's hood you're trembling in Sukuna's hold. "I'll try to be quick," he spoke in a such gentle tone.

'Aw, he's going to make my heart melt by how gentle he is-OH DEAR GOD!!'

You scream in pain and bite into his shoulder to try to muffle your screams. He had to wrap his arm around you tightly to keep you still as your body shakes violently from the amount of pain you were receiving. Sukuna feels you go limp against him, making him stop and examine your face.

You're still breathing, he lets out a sigh of relief. You only passed out because of the pain. He continues to reverse the injury you had on your leg, trying to hurry up. But he stopped when he feels the presence of another nearby.

One he loathes entirely.

"The hell are you all staring at?" Sukuna looks up to see that sorcerer. 

"What a glorious show that was!" Gojo laughs, walking up to you two. "I have to say who would've thought I would live to see the day that the King of Curses saved a jujutsu sorcerer? Wow, that's a sentence I never thought I'd say. Our King of Curses is getting soft on us."

Sukuna's hold on you tightens, worried that this damn sorcerer would try to take you away from him. "Say another word and I won't hesitate to kill you where you stand," Sukuna growls. 

"Aw Sukuna, don't be like that, I just came to check on you two. You disappeared before I could join the fight."

"And why didn't you?"

"Because the other veil was keeping me out, shouldn't you continue healing her, or else she's at risk for losing her leg. Don't let her lose her leg if you do she'll become shorter than she already is!" Gojo looks at your leg, disgust by the sight as all Sukuna had to do is make you a foot. 

This woke you back up and the anger almost made the pain bearable as you point at him. "You're really pushing my buttons you blindfold bastard! Do you want to die!? I will wring your tall ass into the depths of Hell where I came from!" 

Sukuna covers your mouth with his hand as your threats are being muffled. He pulls you back into his hold as your threats keep coming. 

You only stopped when you felt something wet swipe across your lips. 

"Mm!?" your muffled surprised yell is ignored by Gojo, as he assumes you're still threatening him. Just then something hot and wet enters your mouth, making your eyes wide. Sukuna's hot tongue explores your mouth and your knees feel like they're going to give out underneath you.

"As you can see sorcerer I'm busy here," Sukuna replies, annoyed but calm. As if his hand mouth is not making out with you. You screw your eyes shut and try to remain calm so Gojo doesn't see you blush. 

'Damn you Sukuna I'm a pervert and all, but do you really have to do thi-nn!?' 

"Yeah, yeah you two being all lovey dovey, killing curses, fixing legs sounds like a date come true," Gojo waves him off. "The principle just sent me to try to exterminate you. Buuut I'm willing to look the other way if you do something for me." 

A little heart leave's Gojo's finger as he pointed at Sukuna. Irked, the King flicks the heart away and it shatters into a million pieces. 

"My heart!" Gojo cries out. 

"Just spill it so I can go back to fixing Y/N's leg." 

And maybe release some pent up frustration...

"Right I want you to promise me something!" Gojo spoke so cheerfully then suddenly his expression falls void of any emotion. It actually startled you