Of Cunning Minds: Sebastian Sallow

Thea Fields faced a plethora of dangers during her fifth year at Hogwarts. Leave it to Ominis Guant to come knocking at her door seven years later asking her to help him conquer even greater challenges. Little does he know that it's not the evil wizards and dark magic that scare her, it's the idea of coming face to face with Sebastian Sallow again after all this time.

Kind of enemies to lovers.
Post HL story line. A very slow burn :)