Someya Shino

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)

Cecilia, a count's daughter, achieves her dream of marrying her beloved Ralph and joining the marquis' household. But on her wedding day, Ralph announces that his childhood friend Angela will be living with them. Though Cecilia initially accepts this arrangement, she grows increasingly distrustful as spoiled Angela demands constant attention—and Ralph and the servants always prioritize Angela over her. As her newlywed life becomes unbearable, Cecilia finally resolves to escape Ralph's household...?!