Fidia is a poor country baron's daughter. She had a dream of seeing her favorite beast-man duke, Gemil, up close. On the day of the ball in the royal capital, Fidia's expectations rise, but due to a combination of bad luck, she ends up leaving the royal capital without being able to meet him. On the other hand, Gemil was instantly captivated by Fidia, whom he saw from a distance at the ball. She was his "mate of destiny". Gemil passionately pursues and dotes on her out of possessiveness, but misunderstandings occur due to racial differences...!?