Iczelion is the final entry in the “Icz” series, marking a significant departure from its predecessors. Across the galaxy, two villains, Cross and Chaos, devastate and pillage everything in their path, and their next target is Earth. The planet’s only defense is the Iczelions, young girls who fuse with sentient body armor known as Iczels. Nagisa, a typical high‑school student, is about to become the next Iczelion against her will, tasked with defending the planet and saving humanity, though she has her own reservations about the mission.