I couldn't find a single male reader in the supernatural tag so I wrote one lmao.
The reader is a "witch", but not the sell your soul kind. When another witch(incidentally the 'sell your soul' kind) starts on her hit list, you get caught trying to stop her by Sam and Dean. Ironically, your a bit of a small town hunter yourself. After teaming with the brothers to stop miss Do-No-gooder, you decide to stick around. After many hunts and "harmless" flirting, you might just be falling in love with a smart-mouthed son of a gun