Following the fight, the tension is broken by a surprising revelation regarding the "virus" used on the students:
This episode cements Terasaka's redemption arc, showing his growth into a protective, if gruff, classmate who understands the weight of their mission. Ansatsu Kyoushitsu Episode 22
The episode opens on the roof of the island hotel, where the sadistic Akira Takaoka has lured Class 3-E. After blowing up the perceived antidote for his students' poisoning, Takaoka demands a rematch with Nagisa—not for training, but for a public, brutal execution. Following the fight, the tension is broken by
The episode title highlights that this is the moment Nagisa truly steps out of the shadows. While others are stronger or smarter, Nagisa possesses the "natural-born" instinct of a predator, a theme that dominates the remainder of the series. The episode title highlights that this is the
Episode 22 of ( Ansatsu Kyoushitsu ), titled "Nagisa Time," serves as the explosive finale to the first season. It is widely celebrated for its intense psychological stakes, character development, and the definitive arrival of Nagisa Shiota as a top-tier assassin. The Rematch: Nagisa vs. Takaoka
Despite being physically overpowered and beaten, Nagisa maintains a calm smile that unnerves Takaoka. He employs a secret technique taught by the legendary hitman Lovro : the Stun Clap . By dropping his knife to distract Takaoka and then clapping loudly at a specific moment, Nagisa creates a "shockwave" that paralyzes Takaoka’s nervous system.
The poisoned students recover within a day, and Koro-sensei finally emerges from his "Absolute Defense Form". Themes and Legacy