Drarry into the omegaverse

I usually ignore the sectum sempera incident cause it makes drarry problematic

Harry stared at the pair of underwear in his hands, it was a green lace pair of panties that belonged to Draco Malfoy. Harry had found them in the lost and found with 'D. Malfoy' embroidered on the inside. Harry knew it was wrong, but his pent up sexual frustrations got to him. Harry swore he'd return the panties to the lost and found after one use, but he'd had them for weeks now, using the omega's scent to calm himself down during his rut and sniffing them while rubbing his hard cock. Like now, Harry was in the room of requirement holding the panties in one hand and his throbbing cock in the other. Harry held them up to his face and sniffed them as he began rubbing himself. Harry closed his eyes and imagined the omega was with him, and then harry heard the door open. Harry threw the blanket over himself and opened his eyes, his face turning red as he saw Draco malfoy standing in the doorway. "Do you mind?" Harry asked.
"Of course I mind, you're masturbating with my panties, now I have to get rid of them, preferably with fire"
"It's not what it looks like" Harry said, even though it was exactly what it looked like.
Draco approached Harry in the bed and pulled the blanket off of him snatching his panties from Harry's hand. "If you weren't sniffing my panties just now then what were you doing?"
Harry couldn't think of an excuse.
Draco looked at Harry's erection and grinned, wrapping his panties around Harry's cock and starting to jerk Harry off with the panties
"You like me touching your cock Potter?" Draco asked
Harys face was red as he looked at Draco who stopped rubbing Harry's cock "say it. Say you like me touching your cock Potter"
"Don't call me Potter"
"Make me" Draco stuck his tongue out.
"Are we really gonna do this?" Harry asked.
"C'mon we're both 18 and you're masturbating with my panties" Draco gets up "if you're not sure you can stay here and rub your dick with my panties like some pathetic worthless alpha, or you could be a real alpha and take what you really want"
"I don't want to do anything without your consent-"
"You have my consent" Draco says "just don't get me pregnant" he took out his wand and cast the contraception spell on himself. He then purposely dropped his wand and bent over to pick it up, showing Harry his ass.
Harry got up and pulled Draco's pants down, rubbing the panties Draco was wearing. "What's your safe word baby"
"I don't have one" Draco said suggestively.
"Fine, we'll use the stoplight system."
"What the hell is a stoplight?"
"It's a muggle thing. Red means stop, yellow means you're starting to get out of your comfort zone, green means you like whatever I'm doing. You can say Red or yellow whenever you need, and I'll ask you what color you are as we continue" Harry pulled Draco's panties down and I'm looked at his hole which was already leaking slick. Harry slid a finger into Draco's ass "color?" Harry asked.
"Green" Draco answered.
Harry slid another finger in and started scissoring them in Draco's ass, making the omega moan slightly. With his free hand Harry grabbed Draco's neck and pulled Draco back into him. Harry pulled his fingers out of Draco and replaced them with the tip of his cock.
"Is that all you've got Potter?" Draco looks back at Harry and Harry roughly thrusts the rest of his length in.
"I told you, call me Harry" he growled.
"Fuck... You feel bigger than my wand..." Draco moaned
Harry brought Draco back to the bed and bent him over the bed, letting Draco lay his torso on the bed while Harry started gently thrusting in and out of Draco's ass. "Gonna make you scream my name" Harry gruntedand grabbed Draco's hair pulling Draco back into him
"Hey! Be careful, i don't want you pulling all my hair out" Draco said
Harry paused "color?"
"Green" Draco answered
Harry continued thrusting and wrapped his arms around Draco, his hands went to trace the scars he knew were on Draco's chest, but he didn't see them. "Take your glamour off" Harry said.
"Red" Draco said and Harry stopped immediately. 
"What's wrong?" Harry asked.
"Never mention my scars. I don't care how proud you are of marking me so no other alpha would want me-" Draco turned around and sat on the bed
"Draco, that's not what happened I didn't know what the spell did-"
"So you tested it out on me?"
"I wasn't thinking straight" Harry admits "you made me confused about everything and I took it out on you, and I shouldn't have done that-"
"You ruined me Potter, and yet somehow when my mother asked who hurt me, I lied for you" Draco sighs "I told her I didn't know because if I had told the truth either you would have been expelled or I would have been transferred to durmstrang and either way I would never see you until Voldemort had killed you"
Harry didn't know what to say.
"Please, just let me pretend that night never happened and I'm not a ruined omega"
"Draco you're not ruined, any alpha would be more than lucky to have you, and scars are cool-"
"For alpha's maybe, but omegas aren't supposed to have marks on their bodies until an alpha claims them"
"Draco, please, your scars don't make you any less-"
"I don't want to talk about this!" Draco looked at Harry "I don't want to talk about my scars, I don't want to think about my scars, I just want to pretend they don't exist! The only reason you even know about them is because you put them there!"
"Maybe we shouldn't-" Harry started
"Maybe you shouldn't have asked to see the damage you did to me" Draco was crying at this point and he curled up on the bed "Draco, I don't- I didn't" Harry sighs and sat on the bed "it's not healthy for you to just pretend the scars never happened" 
"I know that Potter! I'll face them when I'm ready, but I just want to feel normal again for our last year of school. I want one final year where I'm not fixing the vanishing cabinet for Voldemort, or constantly worrying if you're alive and assuming you are because there hasn't been a 'Potter is dead' party."
"You were worried about me?" Harry asked
"Of course I was worried about you. I'm in love with you!" Draco put both hands over his mouth, he hadn't meant to say that last bit.
Harry blushed and looks at Draco, pulling the omegas hands away from his mouth and softly kissing him. "I think I'm in love with you too" he says
"Then why the bloody hell haven't you asked me out!"
"Because I was scared..." Harry admits.
"Scared? You fought a Hungarian Horntail, and you're scared of asking me out? You broke into the vault of Bellatrix Lestrange and flew out riding the gringots dragon, but you're too afraid that I might say no to you"
"Yes?" Harry spoke in a small voice
"That is the stupidest yet oddly romantic thing I have ever heard"
"So... Does that mean you'll be my boyfriend?"
"Not yet" Draco says "I'll give you instructions on how to ask me out later,"
"Instructions for asking you out?"
"Yes, and a list of acceptable days to ask me out, I don't want our anniversary too close to a holiday"
"Can't we just get together today? I don't want to make a big deal of this"
"Harry, the prophet is going to make it a big deal anyway so we need to control the narrative" Draco explained "if you make a big show of asking me out they'll know our relationship is legit and that I didn't use a love potion on you"
"You promise this isn't some scheme to embarrass me?"
"If I wanted to embarrass you I'd have taken a picture of you with my panties on your face"