I've read basically all the Marcus/Oliver fanfics on here and so I thought I'd write my own!
Flint pushed Oliver against the wall outside Charms. Oliver's head hit the wall hard, silently glad to have Flint to hold him up.
"What was that all about?" Flint growled.
"We're just friends!" Oliver yelled back.
"Oh really?" He didn't sound convinced. "It looked a little more than friendly to me! Especially when he whispered in your ear and you giggled!" The last word was a shout.
"Well he wouldn't have if someone had told Pucey his flies were undone!" Oliver was grinning now. "Or didn't you notice!"
Suddenly Oliver's grin widened. "Flint were you watching me?" Flint just glared.