Drarry into the omegaverse

substitute

"potions... Umm... Today we're going to be..." Harry awkwardly shuffled through the neat notes Draco had left him with instructions on handling the potions class in his absence. The notes were neat and organized with instructions for each year from first to seventh, but Harry couldn't read Draco's fancy cursive script. "You guys are second years, right? Today we'll be brewing polyjuice potion" Harry decided.
A student raised their hand. "Professor Potter, polyjuice potion is a fifth year potion" they said.
"Well, I brewed polyjuice potion my second year, but I suppose you're right..." Harry found the paper for second year and tried to make sense of his handwriting. "I'm sure dra- Professor Potter gave you homework you guys can work on..." Harry was starting to understand why Draco had requested 'literally anybody else' cover his class. "What's the last chapter of the textbook you were supposed to finish?" Harry asked
"6" a student replied
"Alright, read chapter 7 while I figure out these notes" 

Draco got back from dealing with a family emergency early and immediately went to check on how Harry was handling potions class in his absence. He opened the door to the potions classroom and froze in the doorway as he saw an entire classroom full of Harrys. Draco immediately approached the only Harry who wasn't in Hogwarts robes "you were supposed to teach them shrinking solution. Now I have to rework my lesson plans for polyjuice potion, we've been reviewing shrinking solution and they were supposed to brew it today, not make polyjuice potion"
"I'm not the real Harry" Harry tried
"Nice try, you're the only one not wearing Hogwarts robes. I know it's the real you"
"I couldn't read your notes" Harry admitted
"Are you trying to imply my handwriting is messy?" Draco crossed his arms.
"No! Not at all, I just can't read cursive..."
"So all those notes I sent you during our time at Hogwarts, you didn't read a single one!?"
"I liked the drawings you sent me" Harry said
"And the Valentine's day cards and love notes, you couldn't read those either?"
"Draco, it's not a big deal that I can't read cursive"
"It's not about you not being able to read cursive, I don't care if you can read cursive or not, but why didn't you tell me!?"
"Because I was embarrassed..." Harry admitted
Draco sighs and puts a hand on Harry's cheek, "you're an idiot," he says