Omega Legacy (слэш)

After leaving his aunt and uncle's house, Harry heads to the Weasleys' house to start his new school year. Strangely, after fighting the Dark Lord every year, this time what was on his mind wasn't the Death Eaters, but the new class the sixth-years would be teaching.
"The subgenres of witches and wizards," something that Harry, having grown up with Muggles and wasting his time fighting the Dark Lord, hadn't even had time to research.
A subject Harry didn't give the importance it deserved. He only knew there was an incredible smell in the air. Did it matter? Of course not... until he started to feel strange...