Teito Keiyaku Kekkon - Danna-sama to Watashi no Shiawase na Himitsu

This is a story of a serene happiness spun out of a marriage because of a "special ability."

Tamaki had never seen another man quite as beautiful as Kaoru Kirinokouji.

"My life is filled with happiness."

At the age of 18, Tamaki married the beautiful Marquis Kaoru Kirinokouji. In accordance with the contract made at the time of her marriage, she is officially his wife, however she also spends her days doing all the menial labor of the house, working as hard as a busy bee. Furthermore, Kaoru, who is able to "inherit" the future of others, is asked to assist with the numerous requests that come his way, which often requires the assistance of Tamaki as she is able to "see" people's lives and deaths. However, this means that Tamaki will be privy to a secret that Karou has been holding onto for so long...

https://www.cmoa.jp/title/289638/