April Showers Bring May Flowers.
Having given up on life, 16-year-old Chise Hatori sells herself at an underground auction, where she is bought by Elias Ainsworth, a not-quite-human mage, for 5 million pounds. She learns that he intends for her to be his future bride, and her world begins to change.
Aired 08/10/2017EP 1 - April Showers Bring May Flowers.

2017
The Ancient Magus' Bride
Chise Hatori has lived a life full of neglect and abuse, devoid of anything resembling love. Far from the warmth of family, she has had her share of troubles and pitfalls. Just when all hope seems lost, a fateful encounter awaits her. When a man with the head of a beast, wielding strange powers, obtains her through a slave auction, Chise's life will never be the same again.
(Source: Seven Seas Entertainment)