You were Draco Lucius Malfoy's enemy and you were Harry's brother right now you were in Divination class and you were paired with Draco, you both needed to look in the crystal ball.

That's what you did, you and Draco looked in the crystal ball while the other students were doing the same thing and you and Draco saw that in the futur you both would get married.

That made you and Draco look at eachother in shock, the crystal ball never lies so you both know that maybe it was true and you both would get married in the futur.