Werewolves Hate Clogs by K.L. Hiers

Othniel “Neil” Ricci has a sweet new gig working at his uncle’s flower shop—good hourly pay, free room and board, and he has absolutely no idea that the city is apparently infested with monsters.

That is, until he does.
Louis Morénas-Mostro is a werewolf and an underboss in the monstrous crime family who rule over everything that goes bump in the night. When a prized magical artifact becomes inadvertently attached to Neil, Lou is determined to get it back at any cost.

…Even pretending to date him.
Neil finds himself at odds with an entire monster family, their rebellious enemies, and his own growing attraction to Lou. He hopes he lives long enough to find out if their explosive chemistry can lead to something real, but first he has to make sure he doesn’t end up as monster kibble.