Hello I'm an army

Important: I am looking for a jikook story but I forgot the name. In the story jimin is an omega prince but his dying father is making him marry namjoon who is soon to be king of his own kingdom because omegas can't be kings. Jungkook is namjoon's younger brother and his parents don't really like him. Jungkook and jimin meet when they fight a group of bandits and they hate each other at first but then they fall in love. Please please dm me if you know the story I'm talking about. I think I remember the cover of the book is blue and it has an anime guy wearing a blue kimono.