A kid gets a magic helmet and cape from an alien, and suddenly every day is a choice between saving the world and keeping his secret identity intact. The real weight isn't the superhuman strength, it's that one slip-up means his brain gets erased, so every conversation with his friends becomes a calculated lie. This is what it feels like to grow up with something you can never tell anyone, wrapped in a comedy that understands both the power and the loneliness of that burden.

Mitsuo meets Superman, an alien belonging to a federation that works to keep peace across the galaxy. Superman gives him a helmet that doubles as a mask and grants great strength, a cape that lets him fly, and a badge for breathing underwater and talking with fellow heroes. Mitsuo soon meets those comrades, and together they become the Permans, young heroes who keep the peace and help people in trouble. There's a catch. Their identities must stay secret, and anyone exposed will have their brain destroyed. To protect them, each Perman gets a doppelganger robot that stands in for them while they are away. Trouble is, these substitutes are far from foolproof and bring problems of their own. The result is a long-running comedy about kids juggling superhero work with the constant need to keep their secret.