Watashi no Shiawase na Kekkon (Dub)

Miyo Saimori was the unfortunate child of a loveless, arranged marriage. After her mother died, her father brought in his lover and her own daughter, Kaya. From then on, Miyos life was reduced to that of a mere servant. Even worse, while Kaya inherited the familys psychic abilities, Miyo had none—she was truly the daughter with no merit.