Drarry into the omegaverse

vampire Harry (69 parts wooo)

Harry pulled away from the omega's neck, freezing in horror at what he saw as he regained consciousness. Draco Malfoy laid on the floor beneath him bleeding from his neck. This incident was too big to hide. Not this time, not with Malfoy as his victim. Harry didn't know what to do. If he went to get help surely everyone would suspect him of being the attacker, especially given his history with Malfoy. Harry heard footsteps and before he could process the sound Snape walked in. Snape was the last professor Harry wanted to know his secret. Snape took out his wand and silently cast a healing spell over Draco. 
"Professor I-" Harry began but he didn't know what to say.
"Save your excuses for the headmaster, Potter."

"You know I can hear you" Draco said, still staring at the celling as he laid in the hospital bed "Here to finish me off Potter? Make sure your secret doesn't get out?"
Harry took off his invisibility cloak "No, I'm sorry Malfoy, I don't know why I lost control..."
"Well you got lucky it was me you attacked-"
"What do I have to do so you don't tell anybody"
"So you haven't figured it out? They haven't told you? I don't suppose I could hide it from you anymore now that we're mates"
"Mates? But we're both alpha's?"
Draco laughs "maybe I could've hidden it from you" he looked over at Harry "I'm an omega, and when you bit me you claimed me"
"Oh. So we're..."
"Mates. Bonded for life, I'll likely be set free when the dark lord kills you, but until then you're stuck with me" Draco looks at Harry "so, I won't tell everyone that the wizarding world's golden child is a vampire, you won't tell anyone that I'm an omega, and we'll try to continue as normally as possible"
"You're lucky you're one of the headmaster's favorites, normally you'd be expelled for attacking another student, also lucky that my father's in Azkaban. If he was still around he could use his position on the board of governers to make sure you were expelled." 
Harry nods"I didn't mean to attack you, honestly... I just lost control-"
"Of course you can't control yourself. You're trying to hide this whole vampire thing instead of embracing it"
"You think I should tell people I'm a vampire?"
"That's not what I said."
Draco sat up. "Before you attacked me, when did you last feed?"
Harry thought for a minute, trying to remember when he last fed
"You need to feed often so you don't lose control"
"I can't feed, they don't exactly provide goblets of blood for me"
"If they can provide wolfsbane potion to werewolf students and teachers they can provide you animal blood" Draco looks at Harry
"That would mean telling Dumbledore-"
"I mean, you could keep feeding on your classmates, but I don't know how much longer you'll be able to keep things under wraps"

Harry and Draco did their best to ignore the fact that they were now bonded for life. It was going rather well until Draco's first heat. Being bonded to an alpha made the experience far worse than ever before, and nothing he tried could satisfy himself. He needs an alpha, his alpha. Draco eventually got a note to Harry, the paper fluttered over to him in the shape of a swan and Harry unfolded it, overwhelmed by Draco's scent. 'room of requirement, now' was all the note said.
"Can I be excused?" Harry asked, his hand shooting into the air. Flitwick nodded and Harry rushed out of the room.
When Harry arrived at the room of requirement it appeared immediately, inside Draco was laying on the bed playing with himself. Harry growled and lunged at Draco. For a second Draco thought Harry was gonna start feeding on him again, but instead Harry kissed the naked boy's neck. Draco moaned softly as Harry kissed all the way down Draco's body, stopping between his legs and licking up the slick that leaked from the boy's entrance. Draco moaned quietly "j-just fuck me already!" Draco called out desperately.
Harry met Draco's eyes and frantically pulled his pants down before thrusting into the omega. Harry bit Draco's shoulder, being careful not to draw blood as he thrust into the omega, His omega. Harry continued thrusting in and out of the omega, covering him in kisses and little love bites, Draco could put a glamour on to cover them tomorrow. "You're mine" Harry growled "I don't want other alphas even looking at you"
"Harry!" Draco moaned out
"You're all mine" Harry gently bit Draco's chest. "My omega and I want to make sure everyone knows it"
Draco whimpered and looked down as Harry continued pounding into him. "Harry! Be gentle!" Draco gasps
"Do you have a safe word baby?" Harry paused
"Cinnamon..." Draco says
Harry nods "just say that and I'll stop, okay baby?"
Draco nods "okay"
Harry slowly continues thrusting into Draco , gradually picking up speed and moaning as he fucked the omega. "Have you done this before?" Harry asks
Draco shook his head "not like this..." He blushes "not with another person" he looks down.
Harry gently grabbed Draco's chin and made him look up at the alpha "perfect" Harry grins and continues thrusting into the shaking omega. "Remember your safe word baby" Harry says as he bites Draco's chest. That sends Draco over the edge making him cum all over himself. Draco hid his face with his hands but Harry quickly grabbed his wrists and pulled them aside "let me see that pretty face baby" Harry looked at Draco as he gave one last thrust, cumming inside the omega.

"Last night never happened, okay?" Draco looked at Harry
Harry wrapped his arms around Draco and kissed the omega's forehead "yeah yeah, I don't tell your secret and you don't tell mine"
Draco pulled away from Harry "no, I mean it never happened, so it doesn't change anything about our arrangement" Draco says "we're not a couple, we're merely bound by circumstance"
"Why can't we be a couple? I mean obviously we wouldn't tell anyone..."
"Because I don't like you!" Draco snapped "I don't like you or your stupid face with that stupid scar and those stupid glasses and emerald green eyes that sparkle in the sunlight... I deserve a higher caliber of wizard" Draco crossed his arms and turned away from Harry.
"What exactly do you mean by higher caliber of wizard?"
"pureblood-"
"But I am pureblood!"
"You're halfblood" Draco corrects "and there's more to it than blood purity"
Harry wraps his arms around Draco again "please, give me a chance"
"No! Why should I? You put my father in Azkaban, claimed me against my will, and nearly killed me twice"
Harry looked down "I'm sorry... You're right I don't deserve you" he says
"Obviously " Draco says "I'm waaaaay out of your league. "And what happened last night is never happening again!"

It happened again. The following month when it came time for Draco's heat cycle he began begging for Harry. Harry tried to resist the omega, but he couldn't say no to his desperate silver eyes. 

Another month passed and once again Draco pulled Harry aside after class one day, "I'm pregnant with your half vampire baby" he says
Harry stared blankly at Draco in response
"Say something!"
"What do you want to do about it?" Harry asks "do you want to keep the baby?"
"You can't get rid of a vampire baby" Draco says "this is all your fault! I told you I never wanted anything to happen between us again"
"Yeah but then you changed your mind and you were begging me so..." Harry shrugs
"I didn't change my mind! I was overcome by my monthly needs. Now thanks to you I'm gonna get fat and-"
"You're not gonna be fat you're gonna be pregnant"
"Yes, but I can't exactly tell anyone that, unless you want both our secrets out"
"Why does my secret need to come out?"
"Because you got me pregnant!" Draco snapped
Harry wrapped his arms around Draco "we'll figure something out " he says