The story is set on Okinawa's isolated island of Iwado, which has seen a growing movement advocating a return to an autonomous government. Ao Fukai, a 12-year-old boy with a missing father, lives on the island with an old doctor named Toshio and is about to enter middle school. Ao's mother was taken away a decade ago by unknown individuals. Naru Arata, Ao's 12-year-old childhood friend and the story's heroine, lives with her father, older sister, and grandmother. She has a Yuta power awakened within her due to an incident when she was young. A mysterious entity called Secret suddenly appears and launches an attack on the Scub Coral lifeform on the island. Ao launches a certain military FP called Nirvash aboard a Japanese military transport in his fervent desire to protect the island. (Source: FUNimation)

An original video anime, released on Blu-ray in a combined Hybrid Disc that also hold an Eureka Seven AO game for the PlayStation 3. The OVA is set between episodes eight and nine of the series.

In a post-apocalyptic world, the last remaining human settlement in Japan is the heavily fortified city of Tokyo-3. Fourteen-year-old Shinji Ikari is brought to the headquarters of NERV, an underground organization lead by his estranged father, Gendou. He requests that Shinji become a pilot of an Evangelion, a colossal android built to fight against monstrous and destructive alien creatures known as Angels that wreak havoc on the planet and threaten the survival of the remaining human race. Although initially reluctant, Shinji is swayed by the idea of reconciling with his father, and agrees to aid in mankind's perilous endeavor against its alien threat, as the pilot of Evangelion Unit-01. Thrust into the midst of a dangerous battlefield, Shinji must find the necessary courage and resolve to face against the Angels' incursions before it is too late.

When the threat of the Angel menace escalates, mankind's defense force is pushed to its limits, with NERV at the forefront of the struggle. Shinji Ikari and his partner Rei Ayanami are assisted by two new pilots: the fiery Asuka Langley Shikinami and the mysterious Mari Illustrious Makinami. With the aid of their mechanized Evangelion units, equipped with weapons perfect for engaging their monstrous opponents, the four young souls fight desperately to protect their loved ones and prevent an impending apocalypse. But when startling secrets are brought to light, will the heroes' greatest challenge prove to be the monsters...or humanity itself?