Accident

Draco still claims that it was an accident but Harry knows better.

He could maybe believe that the two of them falling in love was an accident…maybe. He could maybe believe that Draco falling over was an accident…maybe. However, it was the fact that Draco chose to 'accidentally fall over' on top of Harry, pinning his arms above his head and their lips against each others in the middle of the Great Hall that made Harry doubt the accidental nature of the act.

Years later and they still fight about the incident. Draco still adamant it was an accident and Harry still adamant it was planned. Maybe it was neither, maybe it was simply fate.