Ou to Kisaki

Chiwa is a country ruled by eight families that originate from mythology. The members of the eight families have special powers called "jutsu", and a man with particularly strong jutsu will ascend to the throne of Chiwa.

Long ago, one of the eight families, the Amaha family, left the capital, causing chaos, but this subsided when a girl from Amaha is chosen to be the hostage queen.

This time, Amaha Awayuki was chosen to be the wife of the new king, Ichimine Naruya. She cannot even touch the king, and can only see him once a month - such a restrictive political marriage has no love or affection. Awayuki was trying to kill her heart and carry out her duties as a hostage. However, using her own ability to see things from afar, "Heavenly Eyes and Heavenly Ears", Awayuki secretly observes Naruya, and learns his unknown feelings, and gradually becomes interested in him---?

(Source: Shogakukan, translated)