Chapter Text
Yuuji wakes up engulfed in strong arms. He blinks his drowsiness away and he registered his body pain, all over his body, especially the lower region. He does not feel any stickiness, so it means that his mate wiped his body before he joins him to sleep. He did not remember what happened after Sukuna popped his third knot but feeling that the alpha took care of him after their mating is nice. Finally, he is thankful that his heat is finally done.
Remembering his heat, he cannot help but feel the post embarrassment. Lewd images started to flash like a film in his memory.
The moan, the bold words he dared to say, and how needy he acted!
Damn, he really went wild and slutty. He does not even know he had it on him to be that-- eager and bold. And as much as he wants to stay in his alpha's embrace, he needs to check out the twins.
He gripped Sukuna's arm and tried to wiggle his way out, but the alpha only tightened his hold. When Sukuna moves his body to snuggle closer to him, Yuuji cannot help a yelp when he felt the king's cock touch his ass. Of course, the alpha has already his morning wood standing on all its glory.
And fuck his omega for liking it.
"Don't move." Sukuna said before diving in the space in his neck and inhaling his scent happily. Smelling that Yuuji smelled like him, it makes his alpha proud. One sniff of them, everyone will know that they have mated.
Mate. Yuuji is his mate.
"Kuna, I need to go." Yuuji whined. As much as he wants to stay in the nest with the alpha, they stayed long enough, and it is time to face the real world. That there are people waiting for them after all the shits that happened. And he is sure that the twins are worried about him.
"I don't want you to leave." The alpha's voice almost sounded like a whine. Yuuji rolled his eyes.
"That's not what you want when we first mated." Yuuji said, and he meant it as a joke, but Sukuna growled lowly.
"Please don't remind me of my stupidity. I changed." Sukuna grumbles and the omega smiled fondly.
"I know, but we need to get cleaned up and see our kids, Kuna." He lifted his hand to cradle the pink spikes of his mate. Surprisingly, it felt soft.
"The brats could wait." The alpha said, starting to kiss and nip the omega's scent gland. Yuuji breath hitch, and he can feel himself getting wet from what is Sukuna doing. So, before that could happen, he keeps on pushing the alpha's head away from his neck. Which obviously does not work very well.
It seems that the alpha is determined to do something business. The hands are starting to do some wonders on his body, and his beast is already squirming.
This bitch, we had enough of fucking already!
"Kuna! We need a proper bath. The twins are waiting outside, and I don't want them smelling me reeking of sex pheromones." Yuuji grumbled. Sukuna growled lowly and mumbled something.
"What?"
"I said you smelled nice with scent on you. You do not need a fucking bath because I will just claim you over and --" Yuuji covered Sukuna's mouth. He was a blushing mess after he heard the older man thoughts.
Wow, his mate really has a potty mouth! And he is saying it with a straight face!
"Su.Ku.Na." Yuuji whinned. He removed his hand when he felt the other man lick it. But the man just raised his eyebrow at him and grabbed him closer again towards his body.
"Kuna!" He cannot help but to shout when he can really-- really feel his mate's dick touching his pussy.
"What?" Sukuna raised his eyebrow at Yuuji. He stared at his mate's blushing face. And he learned that human face can be that red aside from getting a bloody face.
He continued his ministrations, and he really thought that they could mate one more time before meeting the twins, but Yuuji is determined to leave the nest earlier than he preferred.
It is their first day being a mate, and he wants to be selfish, lock up his mate in their den.
"We need to move. Now." Yuuji demanded in his commanding voice. And fuck if that is not hot. His mate looks so fucking sexy when he tries to command him.
Yuuji saw Sukuna smirk and before the alpha could attempt any more misbehavior, he glared at him. The alpha's smirk faltered and sighed.
"Fine." He rolled his eyes and started to get up. He did some stretching and it’s such a music to his ears when he heard his bones cracking. While stretching, Yuuji secretly admired his mate’s body.
Every flex and move of those muscles.
The ripped body, with defined and hard muscles in his abdomen, that deliciously looking v lines, and of course, the proudly standing alpha cock of his mate.
Sukuna wanted to point it out, tease him a little bit but stop himself and let his little mate enjoy the view. He silently went and carried him to the bathroom and did the honor to bathe his mate.
Yuuji gritted his teeth while staring at his reflection in the mirror. He finished his bath, but it was not easy. Sukuna's hands are all over him. Insisting on pampering him and consistently worshipping his body. His hardheaded mate insisted on bathing him, and he defeatedly let him.
He cannot tell if the alpha did an excellent job cleaning him up, or he did badly because there were more kisses and groping than washing up.
And as soon as he dried his body, he stared at the mirror in the bathroom. If he did not know that he was mating with Sukuna the whole time, he would think that someone had beaten him up.
There are bruises all over his body. His neck is full of bite marks or the alpha call it his love marks, but one bite stood proudly from the rest. Sukuna's mark is prominently laying on his scent gland. The sigil of his alpha is drawn beautifully around the bite. His omega preened at their bite mark. And the other bite marks, of course.
Sukuna marked up every part of his body. There are also big marks on his chest and abdomen. His hands and thighs were full of bruises, resembling Sukuna's hands. He did not bother to turn around because he knew he was full of marks over there without even looking.
He heard the shower went off and Sukuna appeared in the reflection in mirror. He glared at the alpha, but Sukuna just hummed, admiring his work. it is a masterpiece, if he will say by himself, but looking at his pouty mate, his other half seems did not appreciate his art.
"Are you trying to eat me up Kuna? Look at these marks! How can I cover them up?!" Yuuji hysterically asked but Sukuna just eyed him up and down.
"You look beautiful in them, hun. No need to cover them up." The alpha said smugly that made Yuuji roll his eyes.
"Well, the twins will think otherwise. So, you need to heal these ones." Sukuna narrowed his eyes. He is thinking if he should hide his work or not. But Yuuji looks so beautiful covered in his marks. It makes his alpha proud.
So beautiful. He looks so much like mine.
The alpha titled his head and had the audacity to lick his lip.
So no, he will not remove those beautiful marks.
"They need to suck it up then." He grinned but when Yuuji glared at him he bites his tongue, tailed immediately went tucked behind.
"Fine. But I'm not liking it." He grumbles before walking closer to his mate and touched the omega's body, healing the bruises and marks with his reverse curse energy.
Yuuji watched Sukuna sulk as his alpha healed his marks from the mating. He was awed at how open the emotions of his mate were. It is a first and he cannot help but think that Sukuna looks so cute, sulking, and pouty. He cannot help but smile because this scene is a privilege that only he can see. Of course, no one will believe him if he tells other people that the king of curses can act clingy.
Sukuna sulking? Huh, that is absurb!
"Now they're fucking gone." Sukuna mumbled. Yuuji scrunched his nose when he smelled the alpha's displeased pheromones. He smelled so pissed off and that is very visible to the alpha's face. He watched him as he walked away and went to the walk-in closet. He followed him there, and the alpha quietly give him his own kimono.
They dressed silently, and Sukuna was still sulking when he was done tying his obi. He shook his head and sighed.
Sukuna was in the middle of wearing his white porcelain kimono when he felt a hand snakes around his waist, tugging the obi and wrapping it around his waist.
Yuuji helps the alpha to tie the obi. And when he was done, he tiptoed and tried to reach the alpha's ear but failed miserably. Seeing the trouble of his mate, Sukuna leaned down and the omega immediately snuck his hands around his mate's neck.
"I'll let you mark me up again, whenever you want Alpha." He whispered sensually to his mate's ear and kiss the alpha's cheek. Before Sukuna could process what Yuuji said, the omega turned his back and walked away swiftly. Sukuna was left dumbfounded but smiled later.
'Oh you will regret saying that my omega. '
As expected, a lot of people wait for their return. Sukuna was walking closely behind him, looking ahead of them and his pheromones were wafting around them, like a veil. He snorted at the possessive display. His alpha is not touching him, but his scent around him speaks louder than action and words. Like telling anyone around them that,
'Dare to touch my mate and you're dead'
Well, he is not going to complain. Sukuna's scent on him makes him feel a lot safer, cared for and loved.
"Kasan!" The twins ran towards them the moment their eyes spotted the couple. The two hugged Yuuji on the omega's waist and Yuuji fondly ruffled their hair.
Pups are safe
"Yes, hello to your father too, brats. " Sukuna grumbles behind him. Yuuji nudged his mate to his side. But the alpha just scoffs and stands steadily beside him, eyeing down their kids. Ryu looked up and glared at his father.
"Shut up old man! What did you do to Kasan? He smelled a lot like you! It is not nice!" Ryu spatted, and to make his point, he scrunched up his nose. Sukuna blinked down at his son looking amused.
"Hoh." the side of his lips is tugging upward. That is right. Everyone can smell him on Yuuji. And no one can change that now. Even how much their brats whine about it, they need to suck it up. A teasing will be nice to do to his spit of fire. But before he could tease their son, his mate beat him to it.
"You saying I don't smell good, Ryu kun?" Yuuji fiend being hurt. The kid flinched and shook his head vigorously.
"Of course not Kasan! You smell wonderful as always. B-but it is different with this old man scent all over you!" Ryu tried to explain but Yuuji pouted at his son.
"So, I do stink?" Ryu began to panic. He does not know how to express himself. Of course, his mother does not smell disgusting stink, but it is simply different smelling like Sukuna at the same time.
"That's not what I meant Kasan! It is not like that!" the kid shouted defensively. Yuuji cannot hold it back anymore and laughs. He patted Ryu's head.
"I'm just kidding baby. I know what you mean. I smelled different because of your father's scent." the kid scoffed and glared at Sukuna.
"But kasan, why do you smell so strong of Sukuna san?" Shou innocently asked. Yuuji blinked at his son's question and stopped. Then he felt his cheeks reddening as well. He avoided his son's innocent gaze and racked his brain to look for an answer.
Of course, how can he explain to his kids that he smelled like Sukuna because they just finished mating?!
"W-well. B-because I'm with him for a long-time a-and there's just the two of us s-so his s-scent got on me r-really strong." Yuuji stuttered and honestly, he does not know what he is saying. He heard Sukuna snickering and he glared at him.
'How dare this man!'
"But uncle Satoru and uncle Kento are always together but it's not this strong. Even uncle Megumi and uncle Toge. And aunt Nobara and aunt Maki. And--"
"That's because we just finished mating, brat. Your mother just finished his heat and we shared it together, that's the reason your mother smelled strongly like me." Sukuna explained. Yuuji eyes widened.
That is embarrassing! How can he say it so nonchalantly!
"Sukuna!" He felt scandalous. He looks at his son and Shou seems to not understand what his father's kind of mating his father is referring to.
"Sukuna san, they're mates too. And they're always being mates, but it does not smell like this." Shou furrowed his eyebrows because he did not get what his father explained. Sukuna grins.
"It's because I just put a baby in your mother's womb, that's why." The twins' eyes widened, and they immediately looked at their mother's flat stomach. Yuuji glared at his mate.
Can he kill him?!
"K-kasan... y-you're pregnant?" Ryu asked and they looked so shocked and lost.
"No Ryu kun. Your father is just kidding." Yuuji continue to send daggers at his alpha, who had the nerves to laugh at the situation.
"B-but he said--"
"Brats. You will understand it once you grow up." Sukuna cut in and smirk at his sons. Ryu snapped and scowled at him.
"Are you saying we're little?!"
"Hoh, I said that you two are still kids. Someday you will find your mate and you will understand what mating really is."
"Now you're saying we're dumb?!" Sukuna smirk widened and he gave Ryu a challenging look.
"I'm just saying you're too innocent to understand what I did to your mother."
"Are you trying to say you hurt kasan?!" Now Ryu's getting riled up. Sukuna grins. Well, Yuuji did cry in pain and pleasure, so he does not know what to say.
"Can't tell." He looked at his mate and licked his lip. Yuuji looks so scandalize.
"What do you mean by that?!" Before Sukuna could answer again, Yuuji covered his mate mouth.
"Ryu that's enough. I'm fine and nothing happened." Sukuna removed his hand and smiled deviously at his mate
"Of course, a lot happened the past few days. And we both know it, honey." Yuuji eyes widened. He saw a light flash below them and before he could stop their son, it was too late.
"Convergence! Scarlet Blade!"
Now, after calming down their raging kid, they need to talk to Gojo. As the head of the pack, Sukuna needs to gain their approval to let him mate with Yuuji. But given the circumstances, the arrangements were in shambles.
Since they are already mated, Sukuna had the right to take Yuuji to his den already, but the alpha still wants to follow the tradition. He will court Yuuji, and claim him again on the omega's next heat, and then they will move to the Ryoumen's threshold.
"Congratulations on your mating, Yuuji and Sukuna."
Of course, his packmates give their congratulatory messages to the newly bonded couple. Yuuji cannot help but blush and feel shy, meanwhile Sukuna felt proud and smug.
"Don't get cocky Sukuna, I will make your courting harder!" The pink haired alpha growled at the white-haired man.
"I don't care what you say, bastard. Even if you will not threaten me, I'm not going to half ass court my mate."
And true to his words, Sukuna courted him in the best and traditional way possible.
He provided for Yuuji. Hunted different animals and cooked for his family. No one was surprised to see how good Sukuna was at hunting, but they were surprised to know that the king of curses knows how to cook—traditional dishes that no one has ever seen.
As the strongest sorcerer and king of curses, protecting the omega and their kids is easy as a piece of cake. But Sukuna did not think of it that way, and made extra sure that his family were safe, wherever they go. The alpha's mere presence is enough threat to anyone who wants to harm them.
As for the personality, well Yuuji knows that Sukuna has a bad temper and that comes with a potty mouth also. His mate was well known as ruthless and merciless. But Sukuna was different towards him and that is special.
For the gifts, he is not complaining that his alpha is giving him a new scented blanket every day. The materials are the softest thing he had ever touched, and his omega preened at how his alpha was taking all the considerations for his gifts. But he is not using it yet-- because he wanted to build it for his future nest on his alpha's den.
Courting the omega is easy, because Yuuji had forgiven and accepted the alpha. But courting their kids is the real challenge. Of course, the two are still skeptical about accepting Sukuna in their own small family. But Yuuji assured the alpha that the two still need time to process that their alpha sire is coming back to their life.
But it has been a month already. His heat never came, and Sukuna was on the edge already. He can court Yuuji as long as he wants. He does not even have a plan to stop after their mating ceremony, but his alpha has been anxious that their mates are not in their den. That is why there is a step on bonding, and since they skip too many steps, they are suffering the consequences.
They cannot take it anymore, that they are away from each other! That is why Sukuna is in in front of Gojo.
"Dame." Sukuna veins in his temple throb at what Gojo is currently doing right now.
"What the fuck Gojo. Move!"
"Dame Dame." Satoru shook his head and crossed his arms across his chest. The pink haired alpha growled and stepped forward.
This bastard in front of him is not letting him to see his mate after he told him that he is going to take Yuuji to his threshold and they will wait for the omega's heat
"If you value your life, you six eyed bastard, fucking move aside." Sukuna let out his curse energy which made Gojo take on a defense stance immediately.
"Heh, as the head of this threshold, I Gojo Satoru won't let a scum like you enter my threshold." Sukuna grinned menacingly.
"Prepare to die then. Domain Expansion--" Before the two could collide, a certain smell made Sukuna pause and look behind the annoying white-haired alpha.
"Honey!" Sukuna called out to Yuuji as soon as he spotted his mate and the omega immediately blushed. He avoided Sukuna's intense gaze and kept looking in the ground. Gojo scoffed and of course, Sukuna did not miss it.
"The fuck is your problem you shitty multi eyes bastard."
"Pft, you call Yuuji your honey? I did not take you to be a sap, Suku chan." Gojo singsong and Sukuna scowl at what he said.
"Said the grown-up man calling his mate darling." Sukuna retorted. Gojo furrowed his eyebrows.
"What's wrong with darling? It's sweet and fucking expressive."
"Then there's nothing wrong with my choice of endearment to my mate, you fucking hypocrite. Right, hun?" Sukuna shoved Gojo away and walked towards Yuuji and immediately gathered the omega to a tight embrace, and blatantly scented him. Gojo Satoru must be damned.
"I miss you." He whispered to the omega's ears.
"Sap." Gojo teases but Sukuna did not pay the man anymore unnecessary attention. It is all on Yuuji’s now.
"Yuuji..." Sukuna called the attention of his mate, which the later just return with a hum.
"Will you please move in in my threshold? You belong there with our kids, not in this shabby fucking downgraded rotten house." Yuuji eyes widened. He looks up at Sukuna and he only sees how serious the alpha is to his offer.
"I'm still here Sukuna and no, I won't let you take away Yuuji and the kids from here!"
"Stop getting in my way Gojo. I am taking my mate and my kids back to my home. And your infinity shit won't stop me from doing it." Sukuna snarled at Gojo, which the white-haired alpha returned with a growl.
"Try your luck, Sukuna." Gojo challenged his fellow alpha and was about to let out his curse energy when out of nowhere he received a nice chop at the back of his neck.
"Darling?!" Gojo whined when his mate attacked him with the back of his clothed blade.
"Shut your trap Gojo--"
"You're a Gojo too! And so, our kids!"
"Fuck. Shut up Satoru--"
"Call me darling already!" Nanami calmed himself when he felt his vein throbbing, an incoming headache to his husband shenanigans. He sighed and decided to talk to the other couple instead of his idiotic mate.
"Yuuji, I agree with Sukuna. It's been a month; Sukuna completed the one-month tradition of courting, and he proved to us that he was worthy as your mate. We and the packs already approved him to be your alpha. And you are already bonded, this is just for following the traditions. And Sukuna's doing that is enough to earn our respect and showed that he really intended to court you before everything that had happened. You can now go to your alpha, Itadori Yuuji. You are now also under the Ryoumen's responsibility."
"But darling~ Yuuji is our dear kid! We cannot give him to an ugly wolf!" Gojo whined but his mate just shrugged him off. He looked at Sukuna and the damn bastard smirked at him. Gojo gritted his teeth.
This damn king curses!
"As the omega of this threshold and mate of this idiot, we fully recognized Ryoumen Sukuna as your alpha, and now can move to the Ryoumen's threshold. You can now have your mating ceremony as well." Sukuna grinned and gently squeezed the hand of his mate.
“Thank you...” Sukuna addressed Nanami and slightly bowed his head. Gojo sighed in resignation, and let his mate handle the situation.
Following the traditional way of courting and mating, it is important to gain the approval of the pack leaders and their packmates to have their members as mates. Because moving to different thresholds is important. You will move to a new home, and the anxiety that they will be treated right or wrong is extremely high.
Those rules were established to make sure that no one is experiencing an abusive relationship. Because disrespecting a mate from a different threshold is likely to result in a war.
Courting Yuuji and following the traditions and customs, it just showed respect and it means Sukuna's honoring that Kento and Satoru used to be the guardian of the omega before they become mates. He showed and proved that Yuuji and their kids will be safe, and they should not worry.
"What now Satoru? Cat got your tongue?" Sukuna smiled smugly at his fellow alpha; eyes were dancing with mirth. He let out his satisfied pheromones and directing it to Gojo, trying not to affect the two omegas.
"Damn you, fucking king of curses."
"Well, thank you "
"That's not a compliment bastard!"
And with the permission of the Gojo's threshold, they had their mating ceremony that night. It was good timing because it is a full moon.
"Tsked, I can't believe you will marry that bastard, Yuuji! But you still have time to run from him!" Gojo ranted but Yuuji just smiled at Gojo.
"Gojo san, I am willing to mate with my alpha tonight. You make it sound that Sukuna's threatening me to mate with him."
"Isn't that true, though?" Yuuji giggled.
"He is right Kasan. The old man does not deserve you." He looks at his son and gives him a small smile.
"Now now Ryu kun, don't you want your mother to be happy?"
"Of course I want you to be happy! It is just-- not with that old man!" The omega sighed.
"You know Ryu, at first I hated it when we were bound to our fate because the goddess chose our mates from the very beginning. I do not like the idea that we are bound by our fated mates. Especially that your father did not like me as a mate at first. But you see, I fully understand now why we have fated mates. Yes, it is a painful process because you need to prove yourself to each other.
You need to show that you as their mate, are worthy and the goddess was not mistaken to tie your soul to each other. And it took us eleven years to accept each other. But the pain and waiting are worth it. I can't explain how happy I am right now, but I hope that you can understand it once you feel your fated mate in the future.
Because even if you get hurt throughout the process, the only person who could take that pain away is also your mate." Yuuji ruffled his hair and gave him a gentle smile. Ryu just pouted.
" As long as your happy Kasan, and if Sukuna is the one who will make you extra happy, then I'm happy that you have now your happiness, Kasan." Yuuji eyes started to water, he did not expect that to come from Sho.
"Tsked, show off. " Ryu glared at his twin, which the other returned with an equal heated glare.
" I am now wondering who is the older, nii san. “Sho continued to taunt his older brother.
" Oii!" Yuuji just laughed at the two when they started to argue. They stopped fighting when they heard the calling horn.
" It is now the time. " Yuuji took a deep breath, and he started to walk towards the altar. And from afar, he can see the important people in their life, waiting for his arrival.
Gojo was walking in front of them, and he was behind the twins. He can see his packmates on the right aisle and Sukuna's packmates on the left aisle. As they stepped closer, his heart beats become faster and faster. Especially when he saw him.
Sukuna wore the special black Kimono that had the Ryoumen's sigil embroidered at the back and some traditional markings on the sleeve. The obi itself had the same markings as the usual one, but Sukuna looked different on the black Kimono.
He looks so big, powerful, and dominant.
And Yuuji cannot help but admire his mate because he just looks extra handsome today. Is that even possible? How is that fair?!
While him, he wore the counterpart of what is Sukuna wearing. A white porcelain kimono with Sakura flowers embroidery. His pack said that he looks beautiful, but he was nervous if Sukuna would also think the same.
And he wants the alpha to think that he is indeed beautiful, because looking at how handsome he is, he also wants to be viewed as breath taking beautiful like his mate.
He stopped panicking and feeling nervous when Sukuna smiled at him. And those eyes are not lying. The softest gaze he had ever seen adorned his mate. Because the alpha looked like he was on the verge of tears. Feeling happy, because finally, they can seal the deal after all these years. And yes, for Sukuna, he was breath taking beautiful. The most beautiful bride he had ever seen.
Sukuna felt that he was the luckiest bastard and very aware that he does not deserve it but fuck it. He will kill anyone who will steal Yuuji away from him.
He felt so nervous now, that he was standing in front of a lot of people, his mate was just a step away and Sukuna kept on looking at him like the alpha was ready to devour him alive. Which is true.
When Gojo stopped walking, they followed suit. They did not miss that both their leaders scoffed at each other, and it caused some giggle and snickers from the audience.
"To the Ryoumen's, I Gojo Satoru, as the head of the Gojo's pack, I present to you, Itadori Yuuji, a child of our pack, as the wife of Ryoumen Sukuna." Gojo gets the dagger from his pocket and slashes it to his palm, drawing out blood.
"To the Gojo's, I Ryoumen Sukuna, as the head of the Ryoumen's pack, is grateful for your acceptance. I swear, in exchange for my life and pride as the head of my own kin, that I will take care of Itadori Yuuji from now on. I, as his husband will make sure that he will have a blissful life, under my care. "Sukuna copied what Gojo did and got his own dagger to draw out his own blood.
With two bloody hands, the two meet in the middle and gripped each other's hands. Forming the blood pact. This signifies that the two packs are now united through the two of them. They are now each other’s extended packmates.
" If you will hurt him again, I will kill you by myself, Sukuna. "
" I am going to die first before that happens Satoru. " Their gripped on each other's hands tightened. When they had enough glaring at each other, they let go of each other. Gojo went immediately to his mate's side to sulk, but Nanami scolded him to go back and performed his duties.
Sukuna looked behind, reached out his hand and Yuuji willingly took it. The two stared at each other. Their hearts were beating so fast, and they could not help but smile at each other.
"You look lovely, omega." Sukuna teased and was successful because Yuuji felt shy suddenly. Not willing to lose, he cleared his throat and met his mate's burning gaze.
"You look dashing as well, alpha." But Sukuna just smirks and Gojo, as their priest, scoff at the sappiness. Gojo cleared his throat to get the two lovebirds' attention. Take note that he still could not accept that Yuuji is marrying Sukuna! But for his child’s happiness, he will suck it up and will prepare to kill the alpha someday, when he dares to hurt his Yuuji again.
He sighed and started the ceremony, for Yuuji’s happiness.
"We are now witnessing the mating ceremony of these two fated mates, Itadori Yuuji and Ryoumen Sukuna. With the two packs agreement, and with the blessing of the moon goddess, you may now pronounce your vows."
Yuuji held Sukuna's hand and fiddled with its ring finger.
"I, as your mate, will stand beside you no matter what happens. I pledge my life, loyalty, and my heart. You have me as your pack, partner and wife. "
Yuuji, nervously said. He was screaming inside his head because he forgot about this part of the ceremony! He forgot to prepare his vow! And just say whatever comes across his mind.
Of course, Sukuna noticed it too and grinned at his mate. But the vow was beautiful. And it comes from Yuuji, so anything his mate said is enough. They have enough days and time to tell each other whatever they want. But of course, he will not half ass his vow for his mate. Not in front of this infuriating Gojo Satoru.
"You have me now wrapped around your finger, Itadori Yuuji. Everything I do from this day forward is now dedicated to you. In this lifetime, I will prove my worth for this chance, and in another lifetime, my heart will still long for you. I'm cursing my own fate to have you as my only mate, now and in different eras."
And a tear fell from his eyes. Sukuna just smiled at him and dried it off immediately from his cheeks.
It seems Gojo was satisfied with what he said and proceeded to the next step of the ceremony.
" You may now give each other the marriage bond. " And they did, simultaneously, in front of everyone, they give each other the marriage bond through biting on their ring fingers. The bite formed a mark, resembling a ring, that showed the evidence of the mating ceremony.
Finally
Sukuna thought as he gave a final lick on Yuuji’s ring finger. The ring marked was beautiful and deep. His alpha preened at the mark. And finally, t he two of them are now bonded, as mates, and as husband and wife. And only death can separate them.
And of course, the ceremony was sealed with a loving kiss.