It all begins with the story that was left untold—the earth-shattering incident where Renton's father disappeared. With the mysterious pilot Eureka by his side, only Adroc Thurston could undo his own mistake, sparking the event that changed everything and earned him the title of a hero. Now, ten years later, Eureka lies in critical condition as Renton leaves the crew of the Gekko. But when he finds himself in the care of his father's old friends, he has a choice to make. Either stay with the loving family he's always wanted, or earn the love he seeks.
Isaac Netero is the chairman of the Hunter Association. Decades ago he sealed away Jed, a Hunter who had mastered the use of On, the dark "shadow" of Nen. Now On users have reappeared at the Heaven's Arena "Battle Olympia" tournament. For Netero, this is the last mission: to protect the Association and the world from a threat driven by hatred and the thirst for revenge. And he's going to need all the help he can get in order to succeed.
In the remote Southern Cross island, a secret organization named The Glittering Crux plans to reactivate giant mobile suits that have been sealed for ages. Known as cybodies, they can only be controlled by pilots identified as star drivers. To unleash their full power, the mysterious group must break the seals of the four shrine maidens that reside in the isle. Recently arrived outsider Takuto Tsunashi vows to stop the Glittering Crux in order to protect Wako Agemaki, girl who saved his life and is one of the four maidens. Wako is a lively young lady who has already been betrothed to Sugata Shindou, a rich and talented childhood friend. Despite being very close to Agemaki, Sugata quietly disapproves this engagement since it was forced on to them due to a family tradition. The melancholic couple becomes a radiant trio as Takuto becomes not only their friend, but protector of the seals since he is none other than the Galactic Pretty Boy, gifted star driver of Tauburn, the 22nd cybody.
Takamachi Nanoha is a normal third-grader who feels a little useless and out-of-place with no purpose. Then one day, she saves a ferret, who turns out to be a mage from another planet who came to this planet to search for the jewel seeds. Nanoha agrees to help, but this task gets complicated when another girl arrives to steal them.