Kamikatari ni Sayonara wo

Ayaka is a girl who was born into a prestigious family that has worshiped ayakashi for generations and can see ayakashi. In order to protect the wealth that ayakashi brought to her, she lived according to her parents' instructions. A life with an ayakashi who pretends to be a "god," and a fiancé who is far older than her. Ayaka, who has doubts about the environment surrounding her, runs away from home. There, she meets a beautiful demon...

(Source: Ichijinsha, translated)