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AU in which Ryoumen is a Titan and Yuuji is an Omegan mortal he's lusting after.
Yuuji is the Beloved Priestress of Rhea, and he's untouched. For some reason, the child hasn't indulged in the acts of the flesh, and that makes his goddess even more protective over him.
Rhea has made it known that Yuuji is to be untouched and left alone. Unfortunately for the sweet child, he has the eyes of almost all the Titans on him due to his beauty, grace and sunshine personality.
Of course, Ryoumen, being who he is, isn't one to be deterred so easily by his mother/sister's warnings.
The Titan dons on a mortal form - which is honestly still huge in size - and descends from the Heavens and visits the Omega one night.
Yuuji immediately knows that Sukuna is a Titan - his godly aura, towering height, as well as the markings on his body makes it obvious - but he's confused as to what this holy Prime Alpha is doing in his Chambers. He gets his answer when Ryoumen takes him into his arms and pulls him into a toe curling kiss that renders his mind blank.
Ryoumen makes quick work of removing and getting rid of the Omega's red, Priestress chiton, making the silk material pool to the floor. He picks up the pinkette and takes him to his large bed. There, the Titan introduces the bright eyed Omega to the realm of sin and pleasure.
The Titan first eats him out like the finest of dishes, lapping at his twitching pussy and drinking that ambrosia slick of his. He uses his tongue to fuck the Omega open, getting loud moans and mewls from the beauty, who has his fingers buried in Ryoumen's hair and his legs spread apart and in the air, held in place by Ryoumen's large hands.
Ryoumen, after having his fill of Yuuji's delicious slick, then moves up and focuses on the Omega's cock. He sucks his cute, little cocklet, drawing out whines and gasps from those kiss swollen, cheery lips of his. As he devours Yuuji's cute little cock, his fingers start to work the Omega open.
Yuuji lets out a loud cry of surprise when Ryoumen's fingers brushed against his prostate, his toes curling in reaction and his fingers tightening their hold of Ryoumen's hair.
Ryoumen grins around the cock in his mouth and starts angling for that spot, drawing screams and squeals from the Omega, who's getting tortured from both end. The Titan closes his eyes and hums deeply when the Omega cums minutes later with a cute squeal, filling the Titan's mouth with his delectable cum.
Through hazy eyes, Yuuji watches as Ryoumen hums around his mouth full of cum, and gasps when the Titan - who the Priestress is now sure is Ryoumen, the only child of of his goddess Rhea and her First Consort, Cronus - thickly shallows, downing his cum.
Ryoumen purrs deeply, the sound rumbling in his chest, as the taste of the Omega fills his senses.
The Omega is nothing short of divine. He tastes ten times better than ambrosia, and Ryoumen feels pride swell up in his chest that he's the first, and most definitely will be the last, to have a taste of this ethereal creation.
The Titan wonders how the others will feel once he makes this beauty a goddess? Knowing them, they will be thrilled and will take ever chance to put their marks on the Omega.
Ryoumen's chest rumbles with a displeased growl at that thought. The sound of sweet whimpering brings him back to the present, and the sight he comes upon makes his cocks twitch in intresest and want.
Yuuji's looking at the Titan with a beautiful debauched look. His garnet jewels for eyes are gazing at the Titan with want and lust, and his glistening cunt is twitching and leaking slick to the sheets - the sight making Ryoumen's mouth water at the urge to devour him again.
With a loud growl that has Yuuji releasing more of that sweet peach and honey pheromones of his into the room and filling Ryoumen's senses, the Titan hunches over him. The Divine Prime Alpha covers the Priestress with his large body, which is rippled with well defined muscles.
The moment flies by so quick that the next Yuuji is aware of is the Titan fucking into him like a beast possessed, drawing loud screams and moans from his lips as he desperately claws at the Alpha's back.
With his two impressive cocks, which fills the Omega up to the point it hurts so good, Ryoumen proceeds in ruining the once pure mortal flower his mother holds so dear.
Ryoumen fucks the Omega's pussy until Yuuji started to accept him freely, pounding against his cervix, as if he wants to fuck himself right into Yuuji's womb. Because of how hung his two godly cocks are, he easily gets Yuuji's prostate, drawing screams and squeals from the Omega. It doesn't take him long to make the Omega cum - making him arch his back as he sprays ropes of tasty cum on his and Ryoumen's stomachs. Some ropes manage to get on the Titan's face, and Ryoumen uses his abnormally long tongue to lick clean the small amount that got on his black painted lips that are stretched in a feral grin.
The Titan never lets down on his thrusts, fucking Yuuji with beastial abandon; his hips pistoning at a fast rate and driving his cocks in and out of the incoherent Priestress with force and speed. His lips are still stretched in a large grin, his sharp teeth shining and his four red eyes glowing with glee and pride as he fucks the Omega till the point he's downright sobbing.
Whilst still on his cocks, he turns Yuuji around - getting a strangled scream from the wide eyed Priestress as he did so - and gets the Omega on his hands and knees, his hips raised in the air. This position has him fucking deeper into Yuuji, his cockhead now successfully fucking into Yuuji's womb and making his lower abdomen bulge with it.
Yuuji cums again with a loud cry that's a mix between a scream and squeal, his eyes wide and streaming with tears. He paints the sheet below him with his essence, which joins the puddle of slick below him. Even at that, Ryoumen keeps on going, not showing a lick of mercy for the overstimulated Omega.
The sounds of Ryoumen's balls and pelvis smacking against Yuuji's red ass cheeks and thighs synchronised with the lewd squelching produced by the Prime Alpha's cocks fucking Yuuji's slicked up pussy, and his beautiful squeals and Ryoumen's grunts and growls.
Ryoumen fucks and fills Yuuji with his cum till his heart's content. He fills up his womb and paints his quivering velvet walls with his essence, making the Omega's stomach distend with it. The incorporation of his magic in his cum sees to the appearance of his Mark on Yuuji's abdomen, right above where his womb is located. Right on the Omega's Mating Gland, Ryoumen bites on his neck and sinks his power into it. He watches as a black band appears around Yuuji's neck, wrists and ankles.
Finally, the Omega's his. Forever his.
The Titan leaves his mother's temple with a pleased smirk, leaving behind a passed out Omega who's painted with Ryoumen's cum from head to toe, along his teeth and claw marks.
Immediately he arrives back home, it's to an enraged Rhea grabbing his face and slamming him into a pillar, breaking it to rubble with his head. The Titaness proceeds in using her son as a bat and destroying half of the palace.
Cronus just watches in the background, calmly sipping ambrosia from a gold goblet, an amused look on his face as he watches his son suffer by his Mistress' hands.
As expected, Yuuji conceives. Rhea is spilt between being pissed by her son's transgression on defiling her Beloved Priestress that was clearly under her protection and service, or being overjoyed that her son mated and put a child into her beloved human servant. In the end, when she sees the cute half breed, who looks like Ryoumen when he was young, she chooses the latter.
Sukuna is just so cute for her to still remain angry at her son's transgression.
The boy is just as impassive as his father, glaring at everything and everyone under the sun - especially those who dare to come close to his cheery mother. He and his father soon become rivals for Yuuji's attention, and Rhea watches in amusement as he loses every single time to Sukuna.
What do you know? Ryoumen, the Great Titan God of Destruction and Chaos, fighting for his Omega's attention with his barely one year old son.
That would teach the brat a lesson.