A bittersweet and tragic romance driven by rivalry between two Royal Families-The House of Karasuno in Miyagi and The House of Inarizaki in Hyogo. Unfortunately, Miyagi's King and Queen's time is coming, forcing them to accept the King of Hyogo's allude to marriage between the Heirs of their Kingdoms. Now, you and Shinsuke have your futures elusively slipping through your fingers in the blink of an eye. However, your eyes catch an alluring man known as the Shadow Prince-enigmatic and disregarded. His divine, green irises seize you to a utopia and you cannot look away. Stuck in an arranged betrothment while knowing that your heart belongs to someone else ultimately spirals into a complex situation for you and the two Kingdoms. The crisis boggles everyone's judgment between duty and love. ...Which will you choose?