"Congratulations, Your Majesties..." One of the maids greeted you and the man beside you before walking away. As the small garden party—engagement party continued on, you wanted nothing more than to leave. You glance to your side and see your betrothed silently gazing at the people in the party, his face unreadable.

Miya Osamu—Prince Osamu—is the Crown Prince of the Kingdom of Hyo. Due to his twin brother's refusal to take the throne, the responsibility is passed on to him. That responsibility came with being betrothed to a total stranger, another royal from another kingdom—you.