Action • Drama • Mecha
Thanks to Professor Yuuko Kouzuki's technology and Kasumi Yashiro's psychic powers, Cadet Takeru Shirogane travels back to his original world. With no time to lose, Takeru aims to enlist Yuuko's help in his world to complete the Alternative IV project—the last hope humanity has against the BETA, an alien species invading the planet. As the anti-BETA project nears completion, Takeru and other cadets graduate from the Yokohama pilot training academy. However, during a test of the new operating system for the Tactical Surface Fighters—the giant combat suits used by humanity against their adversary—the BETA ambush Takeru and his team. Barely escaping with his life, Takeru is left traumatized after witnessing the cruel death of one of his close friends. Losing his will to fight, Takeru flees back to the other world, where he experiences a similar tragedy. According to Yuuko's theory, people from parallel universes are bound to suffer the same fate. As a result, Takeru must overcome his trauma if he wants to protect the ones he holds dear. (Source: MAL Rewrite)
Takeru visits the peaceful world he originally came from to recover the research necessary for Alternative IV to be a success. Upon his return to the war-torn world ravaged by the BETA, he discovers a surprise that brings him one step closer to victory... and danger.
A new set of trials testing the combat readiness of Takeru's XM3 operating system takes a turn for the dangerous.
After a soul-shaking brush with tragedy, Takeru decides to return to his home world.
With it now obvious that he's having unexpected effects on his peaceful home world, Takeru has to make a tough decision.
Takeru returns to the world ravaged by the BETA, only to be shocked when Professor Kouzuki introduces him to 00 Unit.
As Takeru grapples with the truth about the 00 Unit, a deadline to get it functional looms.
The A-01 Squad find that they will be part of a joint operation between the UN and Japan to attack the BETA hive on Sadogashima.
The mission to retake Sadogashima is underway, and the Valkyries take to the battlefield.
The Susano-O arrives, and the outcome of Operation 21st will depend on the performance of the flying fortress.
With the Susano-O inoperable, the Valkyries move to recover the 00-Unit as BETA continue to swarm Sadogashima.
A massive horde of BETA surfaces from beneath Sadogashima, putting the A-01 Task Force and success of Operation 21st in danger.
In the aftermath of Operation 21st, the survivors look towards the future and what they hope will mark a turning point in the BETA War. Source: crunchyroll
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