Becoming a princess should have been the greatest honor imaginable, but then she is betrothed to a foolish prince. Everyone knows that the current emperor's most beloved ninth son was once dashing and invincible, until an accident left him a simpleton. How is she supposed to deal with this "wonderful" marriage? She never expected to become the Ninth Prince's wife and caretaker, with a little follower by her side from then on. But what is going on with all the amorous nights? Could the foolish prince really not be so foolish? Suspicious figures also begin appearing around her. It turns out she is not the daughter of a merchant family at all, but a princess of another kingdom. This is a heartwarming tale between a much-loved princess and a cold, aloof prince.