By the Gods' Grace

Tradition says, if a pair of twins are alpha and omega, they are to be married because that's the way the Gods made them be. Itadori family's eldest son, Sukuna, presents at the age of fifteen. His rut confirms him as an alpha. No one is surprised, but they're happy nonetheless that there's an alpha to continue the family name.

Everyone expected the younger twin, Yuuji, to be an alpha too or at least a beta. He's too strong not to be either one of those. So, when his first heat hits, no one is prepared.

It hits at the beginning of spring. When sakura starts to bloom. The two of them are spending some time together by the river. The bottom of their kimonos wet from water-splashing war and trying to catch river crabs.

It is a hot day, but Yuuji complains that his clothes stick to his back way more than Sukuna's. None of them mentions the sweet smell permeating the air when so many kinds of flowers are in bloom. But Sukuna takes special delight in it. Pausing in whatever it is he's doing once in a while to take deep breaths and feel that scent permeates his nose and lungs. It's only when Yuuji's knees grow weak that everything starts to come together.

"Ah!" he yelps as his legs give out. He's lucky enough to be standing on a grassy patch of land, so nothing gets hurt. But all the power seems to have seeped out of his limbs and there's this sudden... need... to have his brother nearby. So the young boy stretches out his neck, trying to find Sukuna's whereabouts.

"Nii-san?" he calls out. When Sukuna doesn't immediately reply, something inside Yuuji's chest clenches. "Nii-san!!!" he cries out, more urgently. But Sukuna isn't there.

His alpha isn't there...

"Where are you?" Yuuji whines. "Nii-san..."

The cloud of sweet aroma sours as the pink-haired boy looks down to the ground, clenching the fabric of his kimono and trying not to cry. The previously airy and welcoming field has now become too vast and too isolated. The sun doesn't feel as warm anymore, and it feels like suddenly, there is only him in this wide world.

He's so lonely. He doesn't want to be alone. He-

"Yuuji?"

Large hands envelop Yuuji's shoulders, lifting him so Yuuji can see Sukuna's frowning face right in front of him.

"What happened?" The alpha's gaze runs up and down his little brother's figure, trying to find any wound or cause of distress. "Did you get hurt?"

But Yuuji ignores his questions. Too mesmerized by the sight of his alpha finally coming for him, his previous fears disappearing. Too taken with the mouth-watering scent of alpha pheromones from scent glands he's longing to bury his nose in.

"Alpha," Yuuji murmurs. His hands come up to grasp at Sukuna's front.

When Sukuna doesn't push him away, Yuuji takes it as a green light to proceed. "Alpha," he pushes his weakened body to push against his brother's. "Need you..."

Yuuji lets out a muffled whine when the lower part of his body starts to throb. A part that has never produced such a reaction before. But it feels good. How can something pulsing between his legs feel this way?

And it feels like there's something... coming out. Something trickling... dripping down the back of his legs.

Yuuji buries his face in Sukuna's neck deeper, feeling a strange mix of pleasure and shame.

Just what is happening here? Is he pissing himself? How embarrassing! But why from back there...?

He hears Sukuna inhale sharply before letting out a growl. Suddenly, the hands holding Yuuji's shoulders moved down. One winding around his waist, and the other pressing down at his thigh. Just below his ass, and right on a patch of wet cloth.