Toshiue Heika no Bukiyou na Chouai: Seiryaku Kekkon nanoni, Watashi wo Daiji ni Shisugi desu!

Eleanor (18), the princess of a defeated nation, is to marry Sylvis (39), the king of the victorious nation, Adalberus. Eleanor is pitied by those around her due to the vast age difference. However, Sylvis, who awaits her at her new home, is a handsome older man who makes the age difference seem insignificant! Eleanor's heart swells with excitement for the happy married life that awaits her. However, Sylvis seems determined not to lay a hand on the much younger Eleanor—?!