A school built to train the future is hiding bodies. Fujimiya walks in pretending to teach, actually hunting the thing eating students from inside. The show moves like a detective procedural wrapped in action, peeling back layers of conspiracy until you realize the academy itself is the weapon. Four assassins move through this corruption with the brutal efficiency of people who've already lost everything. It doesn't waste time on school drama or friendship arcs. It's built for viewers who want tension that doesn't break, conspiracy that actually goes somewhere, and characters who solve problems by being dangerous, not by learning the power of teamwork.

An elite academy built to cultivate Japan's brightest minds harbors a dark secret. Suicides at Koua are rising, yet almost nothing about them reaches the public. Aya goes undercover as a teacher to investigate the school. Persia soon assigns Ken and Youji to the same mission, since Koua appears linked to the global terrorist attacks that keep breaking out. Together they work to uncover the truth behind the academy and its connection to those incidents, in an action drama that runs for thirteen episodes.