The shadows we hide - a Good Omens human AU

Gabriel De Angelis is a brilliant college freshman, and his parents couldn't be more proud of him; his room is always tidy and his clothes ironed, he's dating a beautiful girl named Micaela, he's always gotten top grades in every class... In short, he's the complete opposite of his older brother Raphael, who, after having drug problems as a teenager, cut all ties with his family.
Albeit a little lonely, the first months of Gabriel's college life go smoothly. Until the day he gets paired with a student named Isabel Maxwell for an assignment.
Isabel - or rather 'Bel', as they want to be called - is a troublesome punk musician who always has a snarky comment ready on the tip of their tongue. And yet, Gabriel can't help but feel fascinated by them.

And as the perfect life he has always lived turns out to be nothing more than a facade, Gabriel's mind floods with questions: does he really want to follow his father's footsteps as a lawyer like his family expects of him? Is it too late to mend his relationship with Raphael? Who are the mysterious members of the band 'The Outcasts', the four students who hide their identities behind demon masks? And why is Bel so angry at the rest of the world around them?
[Cross-posted from Archive of Our Own]