Naoto, a fifth-grader chosen by Scooter—the sentient motorcycle of retired hero Gekkou Kamen—inherits Earth’s protector mantle after the aging legend steps down. Donning the mask, cape, and uniform with zeal, he basks in the admiration of elders who fondly remember Gekkou Kamen’s legacy. His enthusiasm wanes as modern conflicts defy simple heroics: adversaries once deemed villains now sway public opinion, forcing Naoto to grapple with ambiguous morality and shifting social alliances. While clashing with these complex foes, an unrelated extraterrestrial threat silently escalates, unseen by the young hero. Naoto’s journey pivots on reconciling childhood ideals of justice with the messy realities of a changing world, balancing inherited duty against evolving societal values shaped by generational divides.