The virtual world inside the scub coral (intelligent coral-like lifeforms) created by Eureka... The people from that virtual world appeared on Earth ten years ago when it collapsed. Since this large-scale amalgamation, the humans from the virtual world call themselves Green Earth and the original Earth humans call themselves Blue Earth, and they've come to cause various conflicts with each other repeatedly below the surface. Eventually, Dewey Novak, a senior officer in the Green Earth Armed Forces, rises together with his comrades and finally sets a large-scale terrorism plan into action in order to protect their own dignity. Meanwhile, Eureka, who is detested by the world as the main cause of the chaos, has become a high-grade combatant with the UN's A.C.I.D. unit. Live in order to keep this world at peace... This was the path of atonement she chose. One day, she receives an order to protect a girl named Iris, a new Eureka who has the ability to control scab coral. They fight a lot at first but gradually come to understand each other through their lonely escape. Soon the world faces a crisis, and when that happens, Eureka draws on every last ounce of her strength as she fights. I want to protect Iris and this world. What future awaits her at the end of that wish of hers? (Source: Crunchyroll)

Compilation film of the second half of the TV series.

Every 333 years, an abomination is born, a being known as Kuiba, destined to be the nemesis of all, and bring disaster to the world. In Kuiba year 1664, the sixth-generation Kuiba appeared. After narrowly escaping a preemptive strike by the forces of heaven, the young Kuiba was adopted by Man Xiaoman of the Beast Nation, who gave him the name Manji. Like those around him, Manji is unaware of his true identity. With the encouragement of his adopted father, Manji overcame numerous trials before finally boarding a warship bound for Maelstrom Island. There he hopes to prove he is the greatest Spirit Warrior of all by saving the world from the threat known as Kuiba. Meanwhile, on Maelstrom Island, Kuiba's most loyal lieutenants are waiting, ready to do battle with all who oppose their master's return Though unaware of his true nature, Manji must soon face the inevitable conflict between his father, the gods of heaven, and Kuiba's twelve fiercest lieutenants. (Source: IMDB)

Every 333 years the ultimate universal devil known as Kuiba is reborn. With each rebirth, Kuiba brings absolute destruction. In order to battle Kuiba, Deities and people team up and assassinate him just before his revival. In 1664, the year of Kuiba's rebirth, the assassination attempt failed. Kuiba managed to slip into the young body of Manji. As the child grew older, Manji grew a strong desire to become the greatest warrior. When Manji hears the armies of Earth are recruiting to battle Kuiba, Manji and his master enlists to find and fight Kuiba. What he doesn't know is the one he is aiming to destroy is himself. How will he face his fate and accept his destiny?