Chapter Text
Sometimes- Sometimes you shouldn’t joke about being hit by an anime advertisement truck. Especially immediately after your friend said, “One day you’ll isekai into one of your fandoms and you’ll become the very thing you left in the dark. Your hidden self-insert wips.”
Unfortunately for Sukuna, he did exactly that.
Being hit by a truck isn’t so bad, honestly. It only hurts for that burst where it slams into your tense body. Running into the traffic because he got embarrassed since his friend immediately brought up his old anon’ed fics that were available to the public in comparison to his hidden wealth of never published self-inserts is somehow worse . It’s fine though!
It’s not nearly as bad as isekai’ing straight into the path of a massive fuck-off curse sprinting at him like a scare scene in a horror movie. ‘At least it wasn’t Shibuya,’ He muses after processing the sight, throwing an arm through the air like canon Sukuna did, drawing intent and energy into the action.
‘Eurgh. It smells like rot here.’ The curse gets sliced and diced like a particularly juicy tomato. His eyes track some of the flakes it disintegrates into, trying to focus on the energy of the curse and the way it disperses.
He considers his hands, with black sharpened nails and bigger than he was used to. His tongue licks over his teeth, feeling out the changed structure, teeth more aligned than Before. A laugh bursts from his chest, low and strange to his ears. Sliding his left palm up and down his right forearm, feeling the change in muscle density, he looked towards the moon, “What a beautiful night for the drawing of blood…”
Yuuji was going to try to take back his body- a jerk of his (Yuuji’s?) right arm, that felt like a muscle spasm as it pulled out of his grip and grabbed at his (Yuuji’s???) face, confirms it. It was, admittedly, odd; and the reality of the situation and his soon powerlessness in the face of his new Vessel truly hit. He was truly Sukuna now.
“Oi! What do you think you’re doing with my body? Give it back!”
Yuuji’s voice was different. Younger. Brighter.
“This is your body? How… interesting .”
A weak not-quite whimper sounds from nearby, and Yuuji’s body with the mixed will of both Sukuna and Yuuji turns to face Megumi nets him the scene of a terrified teenage sorcerer- but the kid grits his teeth and forms a hand sign.
‘Don’t move-’ “Don't move! Under Jujutsu Regulation, Itadori Yuuji… I will exorcise you!”
‘Hearing that line being said… it’s insane. Hell, if I couldn't feel the cursed energy in me, I’d fool myself into thinking it’s just cosplay,’ Sukuna grins, even as he feels himself be pulled down with an insistent choking of his heart, and Yuuji panics as he tries to de-escalate.
The grin fades, new teeth covered by strange lips.
He’s Sukuna, now.
The Innate Domain is oppressive, a discordance riding through Sukuna’s nerves as he observes the bloody chamber. Unbidden, the “there are two wolves inside of you,” meme comes to mind.
He is One, yes, but he is also Two. It is not that they are… separate, just that they are two stars colliding into one- or perhaps a star being consumed into a blackhole. Something infinitesimally lighter being added to a starving self-consuming heavy mass. There are two Befores, one After.
It’s not like he can do much about it though. The one who suffered was too irrational in behaviour but letting the one who died maintain clarity of memory circumvents that. The memories of the one who died remain at the forefront, allowing a form of detachment, the same way one would avoid use of an injured limb. The Befores could be mended through the merging into the After.
Awareness of the soul exacerbated by the interference, and healing, of it.
Suddenly, regardless of his musings about the integration of the one who died, something tugs in his chest, squeezing around his heart. Sight beyond the dark void of the Innate Domain graces him.
Yuuji has switched with him.
10 seconds.
Sukuna doesn’t have a surprise attack advantage, but staying quiet only increases the chances of Yuuji being mistaken for him, acting distinct from Yuuji to adhere to the storyline is necessary for the beginning as people lack trust in Yuuji’s individuality, beyond Megumi’s attachment.
8 seconds.
Sukuna kicks off from the ground, ignoring the spider webbing cracks from whence he leapt from. Letting his body twist into a kick is even simpler, but even in his minor distraction with the kikufuku, Gojo remains untouched. Attempting to combat Limitless with one finger’s power is a foolish errand.
Battle movements are natural, triggering muscles and following envisioned movement like a dream. Sukuna’s experience rises to his command as necessary. Punches, kicks, palm strikes- most do nothing but destroy the environment as they and the force behind them are deflected.
6 seconds.
He throws himself at Gojo again, meeting the sorcerer's impenetrable barrier with strengthened teeth, biting down onto the thickened space around his raised forearm. Something like shock ripples across Gojo’s face- and something in Sukuna crows with delight.
3 seconds.
Energy pulses, and Sukuna unlatches before his teeth can be torn out from inertia as his body gets flung explosively back. He springs back to fling more and more attacks that are deflected easily by the white-haired sorcerer.
1 second.
A feral grin gets aimed at Gojo. A mocking hand comes up, two fingers extended, and salutes.
0 seconds.
Yuuji returns.
To Gojo, the inside of the pink-haired boy is odd. The cursed energy of the finger was blending seamlessly into him; a second lighter energy to the enormous murderous one suggests that the boy did have enough cursed energy to maintain sense in the face of, you know, incarnating Ryoumen Sukuna (ignoring the fact that many others with far more cursed energy have tried and failed to do the same). Regardless, they are too tangled together to really attempt to remove Sukuna from him.
Sitting in the room of seals, watching the boy’s furrowed brow in his unconsciousness… Itadori Yuuji had already shown signs of being able to suppress Sukuna. If he wakes up as himself, that’ll be further confirmation. It only meant he had to fight harder to make sure he wasn’t executed sooner than absolutely necessary. Indefinite postponement would be best, of course, since Megumi asked.
He would just have to hide the 20th finger.