Remus stood over him, backlit by the noonday sun, his feet spread wide in the sand like a wiry, foulmouthed, mathematics superhero. Sirius held his breath, held his gaze, held every part of himself he was legally allowed to hold on a public beach. He couldn’t have looked away if he tried. Remus seemed to move in slow motion. He pulled off his sunglasses and tossed them onto a beach blanket, then crossed his arms in front of himself, grasped the hem of his t-shirt, and pulled it over his head.