It’s a fantasy setting. This is a yuri (GL) story in which the MC is a slave because she is a beast (half human, half animal). She has animal ears and a tail, and her love interest/master is an elf—a powerful one. The story and art are kind of gory (bloody). The elf sacrifices herself for the MC so she can live, and her hair turns white because her mana is drained in order to save the MC.
https://www.mangago.me/read-manga/beast_of_blue_obsidian/ (blood and gore, violence, slavery, human trafficking, sexual assault, child sexual assault, torture, master-servant relationship, noble-slave relationship, dub-con)
they so cutteeee i miss my girlfriendddddd