I've seen a few post-war Werewolf!Draco fanfics. But has anyone ever thought about how much it could change the story if younger Draco was a werewolf?
This is my personal idea!
In 1993, August 2nd (full moon) Lucius and Draco are in Knockturn Alley for whatever reason, and Draco gets attacked by a werewolf that was wandering around. He gets bitten. Lucius can't look Draco in the eyes for weeks.
September 1st is a full moon, and Draco doesn't want to go back to Hogwarts, he just can't. Not like this. He spends his first full moon in his mother's arms (Snape made and sent him a Wolfsbane potion personally).
The next day, his parents convince him to go back to school. He's transported through floo, right to Dumbledore's office. Everything is too loud and too bright now that his senses are sharper. He can hear everyone all the time and it's driving him crazy. He can't stand being outside on a sunny day and the smell of everything makes him nauseous.
But there's something else. He knows there's another one around. He can sense it. He knows he's not the only werewolf at school, but doesn't know who the other one is. Until his first D.A.D.A. lesson of the year, that is. He immediately recognises Professor Lupin as a werewolf. And Professor Lupin knows about Draco himself.
"I know what you are.", Draco tells Lupin after the first lesson, which is boggarts.
"And I know about you.", Lupin replies, with a kind smile.
They chatted a bit, and Draco strangely liked Professor Lupin. He knew a lot, he'd been a werewolf for most of his life.
Every full moon, Draco knocked on Lupin's door, and the professor would let him stay in his office for the night. Draco noticed Lupin could be forgetful about important stuff sometimes, so he started making sure the older man had taken his Wolfsbane.
"Have you taken your potion yet?", Draco asked.
"Yes, Draco, thanks.", the professor would reply.
They grew closer, almost like father and son. Draco cried into Lupin's shoulder about Lucius's abusive behaviour. Remus spilled a tear or two while telling Draco about Sirius.
Draco trusted Remus more than he'd ever trusted anyone, and that included his mom and his friends.