Scorpius and Albus kept being drawn to each other's spaces. In their first year at Hogwarts, they realized the world has unspoken rules you were meant to follow. Potters and Malfoys don't mix, for various reasons. It's a good thing Albus never really cared about rules. Sadly, Scorpius does, but not more than he cares about being close with Albus. (Characters belong to Thorne & JKR from Harry Potter and the Cursed Child)