In 2026, Natori Touko endures the final day of brutal field training at the Eastern Private Defense Academy's Fuji facility. Her instructor Kamiya announces an unusual extracurricular program focused on experimental weapons research, promising relief from the grueling regimen. Before the students can process this unexpected shift, a catastrophic incident unfolds across Japan that transforms everything. What begins as routine military academy training becomes something far more serious when national security crumbles. Touko and her classmates find themselves thrust into a real combat situation where their classroom lessons suddenly have deadly stakes. The line between training exercise and actual warfare blurs as they're forced to apply their skills in ways they never anticipated. This is a short, sharp action series that strips away typical school anime comfort to ask what happens when adolescent soldiers face genuine danger. It's tense and grounded, focusing on how young people respond when preparation meets reality. The story moves fast across its five episodes, building intensity rather than dwelling on character development, making it ideal for viewers who want action stripped of sentimentality.