Oboru no Hanayome - Karisome no Kon'yaku wa, Aoku, Amaku

The time is Taisho. Kiyoko is the eldest daughter of the Ichichi family, a former noble family. She is a good girl, but because of a birthmark on her face, she is compared to her younger sister and treated like a servant by the family. She goes on an arranged marriage with the sole intention of changing her fate, but her partner, Sakuya, is blind...?