An android boy named Secret must hide his true identity: he’s a superweapon created by the state to fight terrifying monsters. But when he’s not on the battlefield defeating enemies, he lives undercover as an ordinary elementary school student. Bullied by classmates and shunned by teachers for being different, this boy assumes life will always be this lonely. But one day, a newcomer just as unusual joins his class. At first, Secret believes he has finally found a friend—but the truth proves far more complicated.
Set against a richly imaginative sci-fi backdrop, this story is an exploration of a boy's budding self-consciousness. The painful and awkward journey of coming of age unfolds alongside extraordinary adventures.