Yoi Wo Matsu Tsuki No Monogatari

The town where high school student Yohana Sakaki lives is dominated by the Yashiro family, a family of Shinto priests who exterminate evil spirits. Having lost her parents and living with her grandmother, Yohana is summoned to a banquet held at the Yashiro family's estate at her grandmother's request, which leads her to meet a mysteriously beautiful boy, Chitose...!? With the awakening of a new power and an encounter with a boy, the lonely girl enters a world of the supernatural. (Source: Kadokawa, translated)