The island you thought was safe is a military installation pretending to be a town. Every kid who climbs into a Fafner isn't a hero, they're already dead, just delayed. You watch them understand this slowly, then live with it anyway, and that's where the show breaks you.
A quiet island in rural Japan harbors humanity's darkest secret. The students of Tatsumiyajima live ordinary lives, unaware that their peaceful home sits on the frontlines of an apocalyptic war. Incomprehensible alien entities known as the Festum descend without warning, and only one weapon stands between extinction and survival: Fafner, a colossal mecha piloted by ordinary teenagers thrust into extraordinary circumstances. When the invasion reaches their shores, these young people are forced to abandon their dreams of normal futures. They must merge their consciousness with the machine, becoming something more than human to protect what remains of mankind. Each pilot pays a devastating price for their sacrifice, watching their bodies and minds change irreversibly with every sortie. Fafner strips away any romanticism about war. It's a brutal meditation on what it costs to fight for tomorrow, where victory brings no celebration and survival often means losing yourself. Expect gut-wrenching character moments alongside intense mecha combat, all grounded in genuine dread about what awaits beyond the next battle.