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Takumi knew.
They had been together even before birth - he knew that he and Isami belonged together.
Where Takumi was, Isami was close by. When one saw Isami, Takumi was undoubtedly a few steps away.
When he found out he was an omega, that he would soon start his quarter yearly heats, that he and Isami could not sleep in the same room together, Takumi was livid.
He scowled, "Why?"
His mother, who smelled like spices and gelato, her alpha scent mixed with their father's omega pheromones, held him close. Even her normally comforting scent could not appease the red hot fire of anger in his belly. "He's not your alpha, my love."
"He is!" Takumi insisted, his fists clenched. "I'm his omega and he's my alpha. He smells like me!" He pressed a hand to his mother's shoulder, his fingertips inches from the pale puckered skin on her neck. Like dad smells like you!"
She abruptly pulled him into a tight embrace. "I promise, Takumi," she said in his hair. "You'll find your mate. It's not Isami. The love of mates is not the same type of love though." She internally winced, her husband was probably telling Isami the same speech with the same amount of terrible success. “He is your brother and your twin, it's a close, family love. Your mate, whenever you find them, will be someone just as lovely as Isami."
Lies. Isami was the only one for him.
She pressed a kiss onto his forehead, "You'll find your dear person, just like I found your father.”
Takumi stamped his foot down on the ground, disbelieving that anyone but himself was perfect for Isami, and the same could be said for Isami.
“Don’t worry,” his mother smiled, “Isami will find his person as well and you’ll see.”
Takumi cried during his first heat. It had been scary. He had read the pamphlets and watched the educational videos behind his fingers partially covering his face, but it was nothing compared to the real feeling. His father frequented his bedside, providing him liquids and sliding small ice chips into his panting mouth. He murmured reassures and attempted to make him as comfortable as possible with a litany of toys.
He had cried not because of his heat, like his father thought. No, he cried, scalding hot tears dripping down his ruddy cheeks because this was the first time he and Isami had slept in different rooms. Isami was only on the other side of the house but it felt like continents away. That, and the mere thought that Isami was potentially not his mate, not the person to slide his cock inside of him and knot him, made his skin crawl worse than his heat. The only relief came not from the toy inside of him, but the pillow he had taken from Isami’s room at the last second before his heat had arrived. He pressed it against his face, inhaling deeply.
The pillow lost its scent after a day.
The last two days of his heat were an unadulterated hell.
Takumi nearly dragged his father to the doctors for suppressants, almost swallowing the whole bottle of pills once they were in his hands, much to the terror of his father and pharmacist. Afterward, their parents finally caved under his and Isami’s pleads, and Isami was allowed to have the room next to his.
His heats were only limited to once a year with the pills, and after a month of taking them, he almost felt like his old self. If Takumi stuck closer to Isami, baring his teeth to any omega or beta that dares look at him, Isami said nothing. When they were by themselves though, Isami would intertwine their fingers like they used to do when they were younger.
Takumi was grateful that during the colder months - very few people direct their gaze towards his statuesque brother. It was the warm months, when his fat melted off and his firm muscles stretched against his smooth skin, that Takumi had to restrain himself.
---
"You're so tense today," Isami murmured against Takumi's brow. He pressed a small kiss against his older brother's furrowed brow and tightened his grip around his fair-haired sibling as the other pouted in his lap. He had been massaging his older brother's shoulders when the other decided to interrupt him by pushing him down on the bed and petulantly sit atop him.
Takumi sat astride on Isami; his arms were firmly around the other's torso, his nose firmly pressed the delicate curve of his neck, inhaling his scent like a lifeline. Isami smelled like home - like lemons in the summer and sweet musk. He could pinpoint out his scent amongst the throngs of students in moments, not like he was far from the omega anyway. His jaw clenched, remembering the admiring looks of the younger classmen as Isami introduced himself to the entering class with a pleasant smile. The low murmur of approval and desire among betas, omegas, and handful of alphas had been apparent. He sucked his teeth, angered, as he pressed closed mouthed kisses on Isami's warm skin. He opened his mouth and licked a hard stripe down the salty-sweet flesh of Isami’s neck. He couldn’t claim him yet. Not until after he and Isami graduated from Totsuki as top chefs.
"Brother!" Isami's gasped, his grip tightening around Takumi, his fingers scrabbling against his firm shoulders. His hips jutted upward, rubbing his erection upward against his elder sibling.
"You're mine," Takumi growled, low and possessive. He pushed the loose fabric of Isami's oversized sweater upward, revealing his smooth chest. He trailed his lips downward, pressing hard kisses against his golden skin he reached the hard nubs on Isami's chest. He gave them each a quick peck before he closed his mouth around one and sucked hard.
Isami yowled above him, the fabric of his pants damp with his precum from his straining member.
"Isami," muttered Takumi, his teeth gently nipping at the hard bud of flesh. His other hand squeezed the other nub, the palm of his hand massaging the soft flesh of his younger twin's chest.
"B-brother!" Isami sobbed, assisting his brother to remove both of their pants. All the while, Takumi kept his ministrations on Isami's sensitive nipples, switching between sucking and biting them. He pulled away with a pop, his saliva connecting them. The younger twin's nipples were red hard nubs against his flushed and glistening chest.
"Spread them," Takumi commanded, which Isami acquiesced with a embarrassed nod. He opened his legs, his thighs freckled with silvery white marks - his stretch marks from his abrupt weight loss and gain. Littered amongst his scars were fading bite marks and the scrape of fingernails. Takumi loved pressing his fingers against the scars, the tip of his fingernail mapping the delicate flesh with the utmost care. Isami's member was straining tall, a sweet shade of red, the tip of it wet with precum, dripping downward toward the small ball of his knot and further down.
"Eager, aren't you?" Takumi muttered, pressing his hands against the bottom of his younger brother's thighs and pushing them wider until he saw the thick black toy nestled securely inside of him. Isami’s pink hole strained around the girth of the plug, frantically twitching and glistening with sweat as his body shook from embarrassment and arousal from Takumi's undivided attention. He reached downward and pushed the toy inward. A wicked smile was on his face when Isami whimpered, his body convulsing and involuntarily pushing it out to press back against his curious fingers.
"You kept it in you the whole time, right?"
"Yes," Isami cried, his fingers clutching his chest, his fingers tweaking his own saliva soaked nipples. His face was nearly impossibly red when he muttered softly, "You said I had to keep it in me."
Isami had worn a large, loose sweater that day, the ones he wore in the winter when he was heavier; the hem covering the upper half of his thighs to cover up his straining cock. His brother had been unhelpful, leaning against him from behind while in class at every opportunity. His clever fingers rubbed against the curve of his ass, his fingertips brushing against the toy behind the thick fabric of his pants, nudging it further inside of him until his knees felt like they would collapse in the middle of lecture.
"I did," Takumi cooed, pleased, as he pulled it out slowly. His cock twitched, watching Isami’s body resisting the removal of the hard plastic toy, reveling in the sweet gasps from his younger brother with every inch. "Good boy."
Isami blinked back tears, whimpering and squirming as Takumi freed the toy from his body with a wet squelch. His body clenched, loose and gaping. He felt so empty. He reached out towards his brother, "Brother, please!"
"Isami," he growled, throwing the toy on their bedspread, hearing it roll off the bed with a clack. He carefully pressed two fingers inside Isami’s hole, watching it in fascination as it easily accepted him. His insides were buttery soft and warm like the furnace in the winter. He pressed a third finger inward, Isami's entrance hungrily swallowing it with ease; leftover cum and lube from earlier that day slowly dribbled from it.
Isami whimpered and rocked against his older brother’s fingers. The scent of his arousal thick and pungent in the air. His body, his mind, the tips of his toes to the strands of his hair, his everything was begging for his older twin. He was not naive - Takumi had purposefully not left his side after yesterday’s introduction ceremony. He had readily accepted his brother’s advances the moment he had closed the door to their apartment - away from prying eyes - and wholeheartedly submitted to his obviously irate older sibling. Takumi had held him tightly that evening, his nose pressed against the gland of his neck - unbroken and waiting for a mate to claim. It had continued earlier that morning, Isami could smell the pungent smell of desperation surrounding his brother when he had woken.
While under the roaring hot shower, his torso and pebbled nipples pressed against the cold tiles of their bath, his brother’s dick rammed repeatedly inside of him and his name echoing throughout the bathroom like a prayer, did the smell of distress from the omega decrease. It had only been Isami’s garbled suggestion, reeling from his own orgasm and overwhelmed with the feeling of Takumi's hard length inside of him, of a toy to keep Takumi’s seed inside of him – to keep him stretched open and marked for Takumi’s whims. Only when his brother finally slipped in the toy inside of him, his fingers reverently tracing the seam between the plastic toy and the straining skin of his opening, did Takumi’s irritability finally settle down to a simmer.
Or so Isami thought.
His suggestion had only been a dam to quell his brother’s desires.
The first push of Takumi’s hard cock inside of him was abrupt and unforgiving. It would have been painful if Isami had not been stretched the whole day prior.
“Brother!” Isami arched his back, overwhelmed and unbelievably aroused. Takumi’s answer was to pull away and plunge forward, the head of his cock pressed against the throbbing gland of pleasure inside of his body. While Takumi’s cock was slimmer and knot-less, it was longer, which he readily used to his advantage.
“You’re mine,” Takumi muttered with each hard push forward. He had Isami’s long legs thrown over his shoulder. His body hovered over his brother’s prone form, nearly folding him in half, to stare down at his weeping alpha - Isami's tears littering his thick eyelashes like dewdrops and running down his flushed cheeks.
“Yes,” cried Isami before mashing their lips together, his tongue desperate for Takumi's taste. He needed to be as close as Takumi as possible, his body wrapped around the slimmer man. His body was racked with pleasure from the dual assault of Takumi inside of him and against him. Takumi’s tongue thrusted in rhythm with his pelvis, his callused hand wrapped around his younger brother’s straining member. His thumb pressed against Isami’s weeping head, his fingernail grazing against the tip of his cock, and Isami was crying and coming, his voice hoarsely calling out Takumi’s name.
Takumi grunted, breathing unevenly as he staved off his own release. Isami’s internal walls fluttered around his pulsating cock nearly pushed him over the edge but pure stubbornness kept him from claiming his own release. He wanted to dedicate the image of Isami - his light eyes staring up at him - only him; his mouth, pink and swollen and wet from their mixed saliva, open and inviting - to memory. He was completely unguarded, and the thought that anyone but him had the opportunity to see this made his dick harden.
Isami was his.
“You’re mine.” Takumi stated, emotion thick in his voice as he continued his firm thrusts inside of Isami. His hands tightened around Isami’s thighs, “And I’m yours.”
Isami whimpered with each thrust, his mind cloudy with the aftermath of his orgasm, his body tingling with jolts of pleasure with each push and pull of Takumi’s hard cock inside of him, branding him with his ferocity. He wrinkled his nose, his could feel Takumi's member grow larger, the wet heat of his weeping member staining his insides; his brother was close.
“Right?” Takumi said, his voice quiet and desperate. It immediately snapped Isami from his daze. Tears dripped down the older twin's cheeks, his eyes fearful and needy for validation. “You’re mine and I’m yours…?”
Isami raised his arms and wrapped them around Takumi’s shoulders.
“Takumi,” he muttered against the shell of his brother’s ear. Clenching tightly around Takumi’s throbbing dick as if to keep him inside of him. “Always.”
The dam broke.
Takumi roared, his efforts to meet his own completion renewed.
Isami whimpered, feeling the explosion of heat inside his body as Takumi finally came. He soothingly stroked his omega’s back as the other shook through his orgasm. He repeated Takumi’s name as his older brother weakly rocked inside of him, filling him up until he felt his brother’s seed drip out of him and onto their sweat soaked sheets. He would come again later that evening, Takumi's rough fingers inside his lax hole, his index finger circling the quivering rim of his entrance, pushing his come back inside of him and vocally marveling at what a pretty shade of pink his insides were in his ear.
It would be later that evening, after a shower, a snack consisting of fresh mozzarella cheese and thick slices of homegrown tomatoes with plenty of water, and a change of sheets, that they would nestle against one another in their bed. Isami held the omega against his chest as the other snuffled against his neck. They were too tired and satisfied for another round, that would be later in the morning, but the contact was comforting.
“Soon,” Isami murmured against his brother’s fair hair.
“Not soon enough,” replied Takumi petulantly. He licked the gland for good measure, causing Isami to shudder. “You better prepare yourself,” he muttered, “This crop of freshmen are really bold. I’m going to make sure they know you belong to me. And that you know you belong to me.”
“Of course,” Isami chuckled sweetly. “Bring it.”