The fourth sovereign daughter of the Principality of Rain, Nike, has been betrothed to the Sun King, Livius I. After a long journey, she arrives in his Sun Kingdom, only to be shocked by its prosperity. She decides to wander the kingdom herself to see what it's like, when two men appear before her...

Nike heads for the underground temple that serves as the site of the Rite of Illumination. Overcoming peril after peril, she finally reaches it, when she is attacked suddenly by a band of men in black. She flees from them with all her strength, but they gradually catch up, when suddenly...

Tohara wants to keep Nike with her at any cost. But when she learns how Nike and Livi feel about each other, she goes of her own accord to see her granddaughter off joyfully. Nike and Livi return to the Sun Kingdom having formally acknowledged their feelings for each other. And so their new life together truly begins...