The Ancient Magus' Bride - Season 1 Box Set (Vol. 1-9) (manga)

Hatori Chise has lived a life full of neglect and abuse, devoid of anything resembling love. Just when all hope seems lost, a man with the head of a beast and wielding strange powers obtains her through a slave auction - and now Chise's life will never be the same again. The man is a "magus," a sorcerer of great power, who decides to free Chise from the bonds of captivity.

The magus then makes a bold statement: Chise will become his apprentice... and his bride!