Synopsis: Neo Arcadia - Yami ni Saku Niji

In a time long ago, the world was shrouded in an abyss of darkness. The King of Light, ruling from the heavens, longed to establish a kingdom of radiance upon the earth. To fulfill his desire, he dispatched his beloved son, Rain of the Rainbow, to the realm of darkness and its monarch, ebb. But instead of carrying out his mission, Rain and ebb fell deeply in love and defied the King of Light by residing contentedly in the shadowy kingdom. But one day, without a trace, Rain vanished into thin air...?