A giant robot guardian keeps saving Tokyo while your classmates develop psychic powers, but the show treats this like background noise to the actual story: watching a transfer student with an ancient uniform slowly unravel what he really is. Every scene earns its place. The pacing feels impossibly relaxed for something juggling aliens and supernatural awakening, making it rewatchable in a way most mecha shows aren't.
When an alien vessel materializes above Tokyo without warning, Hajime Murata's ordinary high school existence fractures overnight. A cryptic transfer student named Muryou arrives in vintage uniform, and suddenly classmates manifest impossible psychic abilities. A colossal white mechanical guardian appears in the city sky, engaging towering extraterrestrial invaders in brutal combat. Shadowy operatives with concealed weapons patrol the school halls, hunting for something or someone. Hajime finds himself at the intersection of an undeclared war between worlds. His classmates are far more than they seem, harboring secrets tied to the invasion. The school becomes ground zero for a conflict between alien forces and humanity's hidden defenders, all converging on reasons Hajime doesn't yet understand. As reality peels away to reveal impossible truths, Hajime races to comprehend what's really happening around him and why his school has become a battlefield. Friendship means something different when your closest allies might be soldiers, spies, or something else entirely. What begins as mysterious chaos transforms into a desperate struggle for survival and answers.