Getter Robo Arc (ゲッターロボ アーク) is a manga series written and illustrated by Ken Ishikawa based on Getter Robo franchise created by Ishikawa and Go Nagai. It was first serialized in Futabasha's Super Robot Magazine from July 19, 2001, to September 19, 2003, compiling into three tankōbon volumes (two aizōban volumes by Futabasha) until its premature cancellation. Taking place 10 years after both Shin Getter Robo and Getter Robo Go, it follows a new Getter Team led by Hayato to stop the invasion of the Andromeda Stellaration from invading Earth using the new mecha, Getter Robo Arc. An anime television series adaptation by Bee Media and Studio A-Cat aired from July to September 2021.
Plot
Nineteen years after Ryoma Nagare, Go Ichimonji and Messiah Tyr left Earth in the Shin Getter 1 to Mars, the world is recovering from a previous conflict that almost changed the planet forever. Upon that time, the conflict between Earth and an unknown entity known as the Andromeda Stellaration is escalating as swarms of technorganic insect-like aliens almost brought the planet to its knees. However the Saotome Institute, now under the command of Hayato Jin, is doing its best to repel the enemy while training new pilots for protecting Earth against extraterrestrial threats both from within and beyond the planet. All for to pilot a new Getter unit meant as the final legacy of Professor Saotome: Getter Robo Arc.
In the midst of the conflict, Takuma Nagare, a teenage boy and the only son of Ryoma is searching for answers about his own legacy guided by his friend Baku Yamagishi.