A teenage kid pilots a solar-powered robot that runs on pure charm and slapstick. The show knows exactly what it is: 40 episodes of Banjou using an unstoppable machine to solve problems by hitting things, then cracking jokes about it. Every Meganoid that shows up gets demolished with the same casual energy you'd bring to swatting a fly, and the show never pretends the stakes are higher than they actually are.
Banjou Haran's life shatters when his father's creations turn against him. The Meganoids, artificial beings designed to think independently, slaughter the scientist's family on Mars and force the teenage survivor to flee in humanity's last hope: Daitarn 3, a solar-powered robot built from Martian metals. Two years later, Banjou has resurfaced on Earth, living a deceptively carefree life in a sprawling mansion while secretly waging war against the very technology that destroyed everything he loved. The Meganoids follow him across the galaxy with a chilling agenda: convert all humans into cyborgs, perfecting mankind through forced assimilation. Banjou stands alone against this existential threat, relying on his robot's incredible power and an unlikely team of allies, including his devoted butler Garrison and two resourceful women who share his mission. What starts as personal vengeance evolves into humanity's last stand against synthetic perfection. Between glitzy mansion escapades and explosive robot battles, Banjou confronts an uncomfortable truth: the line between man and machine blurs dangerously when survival is at stake.