Oops. Wrong person.
As James and Sirius passed by a group of Slytherins, they heard a strangled sound escape one of them. They both looked over to see a shocked and slightly traumatised looking Regulus Black. The rest of his group, Barty and Evan, were snickering at the expression on Regulus's face at the sight of his elder brother dressed in the outfit.
Regulus scowled at his friends, clearly displeased.
Sirius tried not to laugh, but the look on his brother's face was too funny not to.
James winked in Regulus' direction, and grinned when a blush started to spread over his cheeks, causing Regulus to hide his face in his hands.
That, obviously, caused Barty and Evan to snicker louder, elbowing each other to stop but making things ten times worse.
"Watch it, Prongs." Sirius warned James in a low voice, only just loud enough for him to hear. "That is my brother you're messing with."
James looked over to Sirius, quickly, but he had already replaced his mask. Although, his eyes did have a harsher gaze to them.
"Right, sorry." He replied, keeping his tone low, too.
Sirius eyed him cautiously, before turning his gaze back to the hall of students and waving at them, swinging his hips as he walked, like a model.