The Ancient Magus' Bride, Vol. 1 by Hibiki Yamazaki

In a world where magic and mythical creatures exist alongside humans, a young girl named Chise Hatori, burdened by a tragic past and devoid of hope, is sold at an auction to a mysterious, non-human sorcerer named Elias Ainsworth. As she becomes his apprentice and bride, Chise embarks on a journey of self-discovery, learning about the enchanting yet perilous world of magic, while uncovering the secrets of her own unique abilities. Through her bond with Elias, she begins to find a sense of belonging and purpose, challenging her to redefine her understanding of family and love.