In a distant era, Princess Kurama makes a daring bid for freedom from her confinement alongside her guardian, only to be tracked down and seized by determined pursuers acting on higher orders. In a final act of desperation, she leaps from a cliff and summons aid from the moon itself. In the present, Nakamura Daisuke enjoys a tender date with Hazuki until a glowing mark on his neck pulls him into another world. There he meets the princess, but a moment of isolation leaves him vulnerable to deception that draws him toward the castle.