The Sun's Blessing from the Sunny Kingdom of the Wonder Planet provides light to the other kingdoms of the Wonder Planet. Years ago, when the Sun's Blessing was about to go out, the planet was in great peril, but was saved by the legendary Princess Grace. Today, the Sun's Blessing is about to go out again! It's up to the current princesses of the Sunny Kingdom, the twins Fine and Rein, to save the Wonder Planet.

Kaori is a reserved girl who just got rejected by the boy she likes. Dejected, she goes to the library only to discover a book that allows her to summon a wish-granting demon. He will make her life better, but if she gets three wishes granted, she'll lose something important to her...

Shion Nichigami loves reading and is extremely shy, but when she removed her glasses Shion becomes a detective called "Nazotokihime".