Post-nuclear Earth is barren, and life can't survive on the surface, so the few remaining people have lived under-water waiting for their time to be able to go to the surface. Amamiku and her faithful computer guardians, Pyron and Mayzamik, guard the seeds that contain the DNA for life and re-growth on the surface when the air is breathable again, but not everyone wants that to happen.

Individual pieces of human emotion usually take form as flowers known as Fragments. The select few who possess strong enough Fragments can become Reflectors, beings who equip specialized rings that allow them to connect their thoughts, memories, and emotions to those whose feelings waver. There are two types of Reflectors—those who wear blue rings to protect those falling into depravity by preserving their Fragments, and those who wear red rings to prevent negative emotions by stealing the Fragments of those who begin to develop severe woe. Despite wanting to socialize with people around her, transfer student Ruka Hanari's shy and introverted personality always gets in her way. In a chance encounter, however, she bumps into a woman who happens to drop a blue ring as she hurries away. Unable to return it, Ruka brings it back with her to her dorm. There, she meets the outgoing Hiori Hirahara, who also has a blue ring. They find themselves in several conflicts against red Reflectors, slowly realizing the true power of the rings that they hold. Now striving to become Reflectors themselves, Ruka and Hiori must learn to work together and become stronger so that they can save not only the people around them, but also themselves from the emotions that hold them back.

A renegade scientist in San Francisco has found a way to create a new creature called a Neo-Aragami without the power of Susanoo. When these monsters start to terrorize California, the U.S. turns to the old members of the Terrestrial Administration Center (TAC) for help. (Source: ANN)

After the events of the Blue Dragon series, Shu and Bouquet join a resistance group to fight General Rogi's army of invasion.They encounter a mysterious child , Noi, who has the power to revive Shu's shadow counter-part Blue Dragon, and save her from the pursuit of a red dragon. Now Shu and his company have to set foot once again on a journey to discover the purpose of the dragons, undergo their tests and stop the chains of events which threatens the fate of humanity. (Source: ANN)