Okay so road head right?
(Ignore the physical logistical liberties I take with this, ignore logic cause it sounds hot okay)
So Sukuna is taking Megumi out for a drive in the country or something right. Maybe he has a nice car he really likes (mmm mechanic Sukuna) or maybe he just likes going for long drives to clear his mind. But Megumi requested this trip, which excited Sukuna cause he gets to share something he enjoys with someone he loves.
So they get out there and Megumi comments that it is rather nice, there's just no one around. A farmhouse here and there, but really nothing. No stop signs, no traffic lights, just a nice, smooth ride. He says this as he slides a hand across Sukuna's thigh, giving the inner meat a nice squeeze.
Sukuna's stiffens and tightens his grip on the steering wheel. He takes a glance at Megumi, who simply continues to enjoy the scenery.
Eyes on the road, dear
Sukuna swallows after his head snaps back forward.
Megumi keeps it up, Sukuna doesn't know how long, kneading his inner thigh, not looking at him, and throwing out a few sparse comments.
When Megumi decides enough time has passed he looks over at Sukuna. His cheeks are covered by a deep blush, he's been chewing on his lip pensively, brows furrowed in concentration as he stares ahead. He's been good.
Megumi trails a finger between his thighs, then up the bulge straining his pants, warning him a shudder and a gasp. Megumi glances up with his fingers at the waist band. Sukuna has clamped his mouth shut again.
Good boy.
He undoes Sukuna's pants and dips below his waistband, nudges past his aching cock and heavy balls until his fingers find his rim.
Sukuna jolts a bit at that, and hazards a few quick glances down at Megumi. There? Here?? Now??
Megumi's gaze is steady back at him as he circles him with his fingers, waiting, challenging, can you take it?
Sukuna swallows hard and refocuses on the road and moves his free leg ever so slightly to grant more access.
Very good boy.
Megumi slides his finger in slowly, carefully, gently prodding him open in this unusual position. Just one at first, then another. A little sound escapes Sukuna's throat as they stretch him open.
'Feeling good?'
'Mmhm. Just-' he gasps and wriggles his hips a bit, making Megumi's fingers brush him '-ah, oh, right there,'
Megumi hums at that. Sukuna wasn't trying to be cheeky, he sounds to desperate for that, so he'll let it slide. He slowly massages and grinds his fingers against Sukuna's prostate as they continue down the road. Precum drips from Sukuna's needy cock as it rubs against Megumi's wrist trapped in his pants, sliding down and eventually wetting the fingers inside him. Sukuna does his best to keep his composure, but he's starting to shake, eyes drooping before snapping back open, panting, gasping. Megumi hears more than feels the occasional shift in acceleration. Sukuna's mind reels. How long has he been doing this? How long does he plan to keep this up? He knows Megumi loves to tease him, but how long before it becomes dangerous? The thought thrills him.
After a while of toying with 3 fingers inside him, Megumi decides it's time to move on. He pulls his fingers out, unbuckles his belt without a word and leans over. He hovers over Sukuna's crotch to look up at him.
'If you can handle yourself like a good boy, I'll let you pull over and cum. But if you can't hold it, I'm zipping you back up and you have to sit with it until we get home. Is that clear?'
He watches Sukuna's eyes light up as he tries to steady his breathing. He takes a quick glance down, before staring straight ahead and giving a nod and a tight lipped 'yeah, okay'
Megumi squeeze the base of his cock cruelly and raises an eyebrow. 'i said, is that clear?'
Sukuna makes swallows a moan and takes a deep breath. 'yes, sir'
'good'
So Megumi gets down to work. He pulls down Sukuna's underwear so his cock can spring free and gives it a few good pumps with one hand. His other slides back under Sukuna and resumes playing with his hole as he slides his cock into his open waiting mouth.
The effect is instant, the car swerves a bit as Sukuna let's out a strangled sound and a curse. Megumi smiles as he takes him deeper, licking and sucking his way up and down.
It doesn't take long before Sukuna is gasping and panting like a bitch in heat. He's losing his mind, it feels so damn incredible and crazy and reckless and needs more. He's gripping the steering wheel so hard his knuckles are white. He needs a little something, anything. 'c-can I touch you? Please, sir,'
Megumi glances up at him. He sounds so good with his voice all fucked out. Megumi can grant him a treat. He hums agreeably before popping off. 'you may hold on to my head and hair.'
Sukuna let's out a sign of relief. 'thank you, sir' he sound so grateful he could cry.
One hand slides off the wheel and into Megumi's dark wild locks, shoving down the head already making it's way down his cock. Megumi moans around him. He loves making Sukuna desperate to fuck his face. Megumi still sets the pace, still has full control, but Sukuna is grounded and comforted by being able to hold Megumi, to feel the movement, the pace, the depth.
It's doesn't take long before needy whines and tiny moans begin to escape his mouth. Megumi picks up the pace in response. Twists and turns the fingers inside him, wraps his tongue around his cock and sucks him deeper and deeper. It sounds obscene. It sounds incredible. Sukuna's hips jerk involuntarily, Megumi feels the grip in his hair tight as he tries to haphazardly fuck his throat, grind on his fingers and maintain his course on the road.
A particularly hard jerk has him letting out a pitiful moan and Megumi knows he just stopped himself from cumming. He smiles around his dick before slowly letting up with a pop and a kiss to the tip.
'pull over' Megumi loves how wrecked his own voice sounds, but still carries absolutely authority
Sukuna obeys without a word. As luck would have it, there's a lone tree on the side of the road to pull up under.
He puts the car in park.
He kills the engine.
For a moment, the only sound is both of the catching their breath.
The next few moments are a bit of a blur in Sukuna's memory, but he ends up bent over with his ass sticking out of his car getting railed to oblivion with Megumi's name on his lips like a prayer. Megumi showers him with praise right into his ear, with a few degrading jabs mixed in, roughly jerking him off as he fucks him. He can come as many times as he want since he did so good, but the real reward is that Megumi will keep fucking him through it, until he's had him six ways to Sunday. When he finally finishes inside him, Sukuna is little more than a trembling mess of cum and sweat.
Had Megumi asked before hand, Sukuna might have resisted on account of dirtying the interior of his precious car. But like this, he can think of a single thing to complain about.
(I ain't scrolling back up thru all that so if you see typos no you didn't)

Lol funny you say convince you not to ruin him I was actually just thinking of another fssk last night
I was thinking of fssk cockwarming and then my brain was like what if he gets cheeky and starts bugging Megumi while he's busy on the phone or the computer or something? And Megumi like okay fine you little slut and sticks it in him (mouth or ass, I couldn't choose one). And then Megumi reveals that he's actually on the phone/face timing with Yuuji and Sukuna is like oh shit and has to keep quiet while they have the longest conversation known to man
I also had some fssk road head thoughts yesterday but I don't have time to type them out now 😭