Muichiro is the crown prince of the Tokito kingdom but he doesn't have a wife yet so his parents are looking for a wife for him. You are in another kingdom but because of your introverted personality you rarely go out to meet anyone. One day, your father tells you that you have to marry Muichiro because a few hours ago, he received a threatening letter from his parents and forced you to be his crown princess or they will send troops to invade your kingdom. You don't like to meet many people but you have no choice but to agree to be his crown princess.