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Marco had always thought his roommate, Ace, was a beautiful mate, even when the other presented as an alpha, the blond still thought the younger would be a perfect mate…specifically, his perfect omega.
Sun kissed skin that was dotted with freckles, a beautiful smile that came out, along with a body that anyone would die for…
Marco could just imagine running his fingers through those wavy black locks as he fucked the alpha out of him, made him cum just from being fucked and turning his cock into a useless thing as he bred him full and—
Marco shook his head…all in due time.
For now, he had to get everything prepared…
⸻
Marco prepared the apartment for what was going to happen. He had done extensive research on this, he wanted to make it perfect when he made Ace into his perfect mate.
He just had to make sure everything was made for the perfect day and even the next couple of ones of fucking…He heard the front door open and Ace cheerfully call out that he was back, the blond’s excitement rising.
The doctor knew that the results would be worth it, even with the consequences that could lay behind it…after all, bitching and bonding a forcefully turned omega could be dangerous…
But that was beside the point, he shook his head as he approached Ace, the younger alpha was removing his combat boots after coming back from his part time job and the doctor smiled at the unguarded way Ace acted around him.
It showed how much better as an omega he’d be, that way Marco could protect him from everything that wanted to hurt him, just like Ace had to protect himself this entire time.
The doctor smiled as he approached, taking Ace’s jacket and hanging it on the wall. He just had to time it perfectly and—
“Ouch?!” Ace’s hand flew to the back of his neck as he whirled on Marco, gray eyes confused and annoyed. “Marco, what the hell?”
“Oh, don’t worry about it, yoi.” Marco smiled, even as Ace bared his teeth in a snarl. “I’m surprised you felt it, with how thick skinned you can be.” Ace snorted, features smoothing over in amusement, but concern flickered into his eyes a few moments later. “Hm?”
“I feel…” Ace's body swayed and Marco opened his arms to catch the smaller alpha, holding back a small growl from the unsavory scent that Ace had…once he was the perfect omega, he’d smell so much better . Sweeter and breedable, just how Marco wanted it. “Not so good?”
“Easy there, Ace…” Marco began to lead Ace to his room, arm wrapped tightly around the small waist that was always teasing him…
“Mn…yeah…” Ace’s eyes began to flutter and Marco grinned, unseen by the shorter. “I think…you’re right…”
By the time they made it to Marco’s room, Ace was dead weight, mostly unconscious in the blond’s arms, who had taken to carrying him bridal style. He laid the sleeping young man on the bed and began to go about with the final touches. He tied Ace to the bed, arms over his head with thick leather rope, not metal that would bruise his beautiful boyfriend, made sure he was laying on his front, giving Marco easy access to his ass and he wouldn’t have to watch that soon-to-be useless cock flop around, since he had no intention of touching it at all.
His perfect mate could cum untouched, Marco knew he could…
Once everything was set up, Marco got to work.
⸻
When Ace began to come to, he tried to remember what had happened to lead to him falling asleep, until he felt a searing , burning pain inside him and he jerked, trying to move away only to realize he was bound to something. He jerked as far as he could and a yelp escaped him as the thing inside him shoved in harder and deeper.
“W-What-?” A hand grabbed his hip and pulled him down, making him choke on his breath. “Who?”
“Ah, you’re awake, yoi.” Marco’s voice drawled behind him and Ace felt his fear skyrocket, with the memories of what happened prior coming forward. “I’m glad…I’ve already came in you so many times and your poor useless cock hasn’t come once…then again, it hasn’t moved since your cunt came.”
“M-My…huh?” Marco used the leverage on his hips to drag him onto all fours, ass presented to the blond, making Ace’s head drop down and his skin paled at the sight of a cock thrusting into a new entrance that wasn’t there the night prior. His once average sized alpha cock laid there limply, not even twitching, but it was smaller now…looking more like an omega cock then the one Ace remembered having just a couple of hours ago. “Marco…what d-did you do?” Another harsh thrust made him cry out, hands clenching so hard he drew blood.
“I’m just changing you to what you always should’ve been, yoi.” purred the older alpha, yanking Ace back onto his cock again, easily shoving himself further inside and Ace felt his eyes roll slightly from the feeling. “And your body has been so…receptive to the changes.” A hand moved over and flicked his nipples harshly, making Ace moan slightly, before he panicked at the noise. He’d never tried playing with his nipples, so the fact that he’d been down long enough for Marco to teach his body that reaction terrified him. “First your cock tried to knot something, but I made sure your body realized it didn’t need to do that. Then, I made sure to put so much cum in you, that your scent turned sweeter and no longer that hideous smell it was.”
The more he spoke, the faster his hips moved and Ace was horrified to notice that his own hips were moving with him…and he wasn’t even horrified, in reality it felt so good…Another long drawn out moan escaped him as his eyes rolled to the back of his head. It felt good…Marco’s cock was larger than the average alpha, which meant it was hitting deep inside him and it was making his body feel things…
He panted as his body began to heat up, the pussy he had now, releasing slick at an alarming rate, making it easier for Marco to push into him repeatedly. “Oh, look darling,” Ace whined at the coo and pet name. “Your first heat is starting, isn’t that exciting? It means it worked! My hard work paid off, yoi!”
Ace knew he should’ve felt sick at the words being spoken, but instead, he felt enthralled at the thought of being in heat, being with Marco …His mind blanked completely, mouth falling open uselessly and eyes rolling back when Marco suddenly leaned forward and sank his teeth deep into his mating mark, leaving a bloody mess behind.
Ace felt his body tremble, liquid gushing from his new cunt as he drooled uselessly against Marco’s thrusts and everything felt too much and too good … “M-Marco!” He finally cried out, yanking at his wrists, wanting to touch Marco, his alpha . “Alpha!” Marco rumbled behind him and Ace made sure to return the favor with a loud purr of his own. “Alpha…Alpha…Alpha!”
“That’s right, that’s my good omega…” Marco pressed a kiss against Ace’s cheek as his hips sped up. He kissed Ace harshly, his tongue easily pushing into the other’s mouth and Ace moaned weakly around the invading appendage as his body shook and a flush came over his cheeks. Marco’s hips picked up their speed, his cock trying to reach deeper into Ace, nudging against his cervix before pressing in as deeply as he could, his knot expanded and then—
Marco hushed Ace when he sobbed, hips shifting as he turned Ace around and nudged the new omega towards his neck. “Go on, love. You need to mark me back.” Messily, Ace tried to bite at his mark, but he needed to be guided, body still adjusting to the change.
Once Marco felt Ace bite into his neck, he felt a dark feeling of completion come over his entire being as he spent the rest of the night scenting and loving on his omega.
His perfect mate.