Detentions
It was a warm summer's day at Hogwarts School of Witchcraft and Wizardry and everyone was outside save for a select few students. Lucius Malfoy and James Potter were two of them, which was no mere coincidence. It had started a few months ago with Lucius surveying many of James' detentions (most consisted of some sort of clean up of the Slytherin dungeons), escalated to malicious bantering, and then fell back into a demeaning silence. Shortly after, when James had to miss a practice for one of his detentions, they found a common interest in Quidditch. It had gone somewhere else entirely when James had slipped on the wet floor and fallen into Lucius' lap. It was now a way for some much needed stress relief, the way they would lock themselves away in a broom closet and snog each other senseless. Lucius didn't want to marry Narcissa and at this point James had mostly given up on ever being with Lily. For now, even though they hadn't talked about what they were (if they were anything), whatever it was, was enough.