Fics like The Demimonde

After the torment and terror of fifth year, and with his mother dead, Severus wants nothing more to do with Hogwarts, or even Wizarding Britain. He flees to Paris in search of his last living Prince relative, but what he finds instead is a courtesan using his family name. With nowhere else to go, she takes him under her wing, trains him up, and turns him lose onto the Wizarding World. His appetite for revenge leaves few unscathed.

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