Victoire and Dominique's experience of NEWTs wasn't quite Louis' experience of NEWTs, mainly because Louis was incapable of being stressed about anything, but he certainly was tired when he made it home. Just the stress of everyone else was exhausting - as a 'still waters' kind of guy, Louis found himself carrying out a fair amount of emotional labour for his friends as they panicked their way through the most important year of school. Apparently most of them planned to do a lot of studying through the holidays, rather than eating mince pies and charming tinsel into amusing shapes, which was Louis' plan. Ah well, it took all sorts, and no-one was more cognizant of that than the most laidback of the Weasley clan.
After flooing into the wrong room, Louis entered the kitchen noiselessly, wearing black jeans and a hand-me-down t-shirt from some relative or other, and was pleased to see that his sisters weren't fighting. From their eyes on Dominique's ring, he knew they must be talking about Alfie, but that didn't stop him pretending otherwise.