Fans of the Impossible Life by Kate Scelsa

Coming together in the most unusual circumstances, Jeremy—buried deep in isolation since a disaster ruined his last year of school—finds himself drawn to Mira and Sebby. Mira is pretending to be more than she truly is after having promised her parents she'd try to be better, starting over at Saint Francis Prep, and Sebby is brighter than the sun; even when his foster life starts to weigh him down and a relapse hovers on Mira, they craft something beautiful and magical to heal the broken, and Jeremy wants nothing more than to be with them.