Naota is a detached sixth-grader afflicted by the pangs of puberty. When a crazed girl on a motor scooter runs him over and brains him with a bass guitar his life gets weird - giant-fighting-robots-shooting-from-his-skull weird.

Naota’s attacker, Haruko, is now his dad’s live-in housemaid and she says she’s an alien. Mamimi names the robot from Naota’s head Canti, the God of Flame. Does Canti have anything to do with the mysterious fires burning all over town?

The president of Naota’s class, Ninamori, is no stranger to the dirty deeds of politics. She rigs the vote to cast him as the lead role of their class play. But she gets in over her head after a crashing introduction to Haruko.