Siariz no Shugosha

A master-servant fantasy featuring a guardian who lost a loved one and a legendary shrine maiden.

Sabi, a man who is considered a heretic by the religious townspeople, meets Alice, a girl who is said to be the reincarnation of the legendary holy priestess "Siariz." Alice tries to choose Sabi as her special partner, the Guardian, but loses her life due to a strange occurrence in town. Then the soul of the legendary "Siariz" who resides within her awakens...?!

(Source: Hakusensha, translated)