Twists of fate (слэш)

The war is over, but Harry Potter discovers that peace alone cannot silence the ghosts.
He needs answers—a bridge to the one who, unwillingly, has been closer to him than he ever admitted: Severus Snape.
During the Christmas holidays, in a half-empty castle under the falling snow, Harry attempts his first real contact. Snape doesn’t reject him… not entirely. A fragile truce seems possible.
But Hogwarts never allows truces for long.
Four children appear out of nowhere, frightened but determined.
They claim to come from the future.
They claim their name is Snape-Potter.
They claim to be the children of Harry and Severus.
And with that single revelation, the present—and the future—changes forever.