Professor Shikishima spearheads the creation of Mechander Robo, humanity’s last hope against the Doron Empire’s conquest after their energy-detecting satellites obliterated 95% of Earth’s technological infrastructure. His mechanized defense system demands meticulous deployment to evade orbital detection, as even minor miscalculations could trigger catastrophic bombardment.

His personal history entwines with the war when the Doron Empire covertly transforms his wife into the cyborg commander Medusa, erasing her memories and forging her into a ruthless adversary. Unaware of her true identity until pivotal moments, Shikishima battles not only to reclaim Earth but to unravel the fate of his lost partner, his resolve shadowed by this concealed emotional burden.

Mechander Robo initially functions through three synchronized jets piloted by a specialized team under his command. Following the machine’s near-destruction, Shikishima engineers its rebirth as a four-unit amalgamation, upgrading its firepower and resilience. Each combat operation hinges on his precision, as battles must terminate within three minutes to outpace the satellites’ retaliatory strikes—a relentless countdown shaping every tactical choice.