Reincarnated in the world of a strategy simulation game, Princess Fealis used the game knowledge she learnt in her previous life to play an active role as a war princess. However, as soon as the war had ended, she was ordered by the king to get married. On top of that she competed with her younger sister for a matchmaking, and depending on who she ended up with, she could possibly be disallowed from involving herself in national affairs... I'd rather build a country than be married! As I struggle to arrange a political marriage that will give me more territory, Olfed, a sorcerer who is also a trusted subordinate, as well as a potential fiancée, unexpectedly confesses his love...?!