Drarry into the omegaverse

the Castle itself ships drarry

Harry saw Draco sneaking into the room of requirement and followed underneath his invisibility cloak. Inside there were several cork boards with pictures of wedding dresses and flowers, and wedding venue pictures.  Draco was examining a board with several pictures of the eiffle tower. "Do we have our wedding at the base of the tower or Inside the tower?" Draco thought for a moment before deciding "inside the tower so we can perform the wedding rituals without worrying about muggles"
Harry sighed internally, he couldn't leave without Draco noticing that he was there in the first place, so he was stuck listening to Draco plan his wedding. Harry tuned Draco out until he heard his name. "Harry's allergic to chrysanthemums, so we can't have any of those at the wedding-"
Harry was in fact allergic to chrysanthemums, however he had absolutely no idea how Draco knew about his allergy. Harry hadn't told anyone about his allergy, and it never came up otherwise.
"Roses are a pretty safe option, we can have those at each table for the reception... Would lillies be appropriate?"
Harry took off the invisibility cloak "I'd love to have lillies at our wedding"
Draco gasps and stumbles backwards "Potter! Were you following me around?"
"I had to find out what you were planning" Harry said. "Of course I didn't expect you'd be planning our wedding"
"Our wedding, don't make me laugh Potter, like I'd ever marry you"
"Cut the act I heard you say my name earlier"
"I was talking about a different Harry" Draco lies "you don't own the name Harry, other people with your name exist"
"Uh-huh and he's also allergic to crysanthemums?"
"Are you allergic to crysanthemums? I didn't know-" Draco turned red "in that case I'll have to make sure we have a ton at the wedding-"
"Fine, if you're not planning our wedding I guess I'll marry someone else, good luck with your other Harry... hmmm cho or Ginny..." 
"Ugh neither of them are a good fit for you. Both of them only like you because you're the chosen one"
((An: I actually love Ginny as a character, so I don't like to shit on her, but Draco hates her because she thinks she's in love with Harry when really she's just starstruck by him))
"So?" Harry approached Draco, backing him against the corkboard that had their wedding plans laid out clearly. "Who should I be with?"