The Classroom of the Black Cat and a Witch

Spica Virgo is the kind of apprentice witch the magical academy refuses to consider — no inheritance, no money, no working spells. She gets one offer she cannot refuse: a talking black cat with full witch-tier magic and a curse he wants broken proposes a deal in which Spica becomes his apprentice and learns spells through him. The catch is the breaking-the-curse half of the contract, which can only be done through kisses on a tightening schedule. The series is the academy year that follows, the secret of the cat's human identity, and the spells Spica accidentally improves on while studying.