You wake up as a prisoner with no memory, and the girl who saves you hands you a weapon that thinks for itself. The show moves at the speed of someone who just realized they have no time left to waste. By episode three you're already deep in something genuinely strange, a world where giant god-machines sleep under cities and the people fighting over them are running on borrowed time and borrowed bodies.
Azuma Ikki returns to his hometown after a decade abroad only to be captured by mysterious soldiers. Kogane, his childhood friend, intercepts his captors with an impossible weapon: a sentient mechanical arm grafted to her body. Ikki learns the shocking truth about his own biology and the world's hidden secret: humanity shares the planet with intelligent, modular weapons called Bubuki, fragments of a colossal sleeping titan known as Oumai. Forced into an unlikely alliance with Kogane and other Bubuki users, Ikki becomes caught between those who want to awaken the titan and those desperate to keep it asleep. The group races across Japan uncovering the mystery of what Oumai represents and why shadow organizations will kill to control its resurrection. As Ikki trains to master his own Bubuki, he grapples with fragmented memories of his past and questions about his connection to the looming god-machine beneath their feet. This is mecha action filtered through the lens of personal mystery, where giant weapons are secondary to the characters wielding them and what they're willing to sacrifice for the truth.