In the enigmatic Mysterious Planet, seven realms coexist, each illuminated by the Sun's Blessing originating from the Kingdom of the Sun at the planet's center. The core sun's radiance is vital for the survival of all realms. However, a mysterious force is diminishing the Sun's Blessing. Without intervention, life on the Mysterious Planet is doomed. Luckily, the twin princesses of the Sun Kingdom, Fine and Rein, possess the magical power of Prominence and are determined to uncover a solution to restore balance.