Severus Snape

That masquerade ball was just another event he didn't want to go to, but his mother insisted and he only accepted when she invited Lily Evans.
Perhaps the night wouldn't be so bad if he danced with her. But Lily couldn't stop talking about James Potter. Severus suggested they dance together. Although she refused, he convinced her on one condition: if a girl turned him down, she would dance with him. Determined to fail, he approached a girl who was rejecting invitations. An ethereal figure in a white dress and matching mask. He expected a "no," but what he received was an outstretched hand.

The waltz began and for the first time in a long time Severus Snape felt comfortable, as if the world wasn't waiting for him to make a mistake.
-You don't seem like someone who enjoys this kind of events.
"I don't," Severus replied honestly.
-So why did you come?
-Obligation, perhaps something like a punishment
-And I'm part of the punishment, Severus?
"I don't know yet," he replied surprisingly without a hint of sarcasm.

She gave him a genuine smile as if she had no need to impress anyone.
-By the way, since it seems you know me, shouldn't you at least tell me your name?
-I only know what you show... And it's not much, besides you would know my name if you paid more attention to your surroundings and didn't just analyze coldly.

At the end of the dance, she left, but not before winking at him, leaving him bewildered. The next day, Severus couldn't get the stranger in the white dress out of his head. It wasn't love, that was clear, because he only loved Lily, but there was something about her that had shaken him more than he cared to admit.
Lost in his thoughts as he turned down a hallway he bumped into a girl, obviously he wouldn't apologize even though he was the culprit
-you should pay more attention to your surroundings
He wasn't surprised by what was reprimanding him, but it was the same voice and look as the mysterious girl at the dance.

Was it coincidence? Magic? Fate?