Taro Sakamoto, the legendary hitman who retired to run a convenience store with his family, infiltrates JCC, the elite assassin academy where he trained, alongside his telepathic partner Shin Asakura. Posing as transfer-exam candidates, they work through combat trials and rival examinees to reach intel on Slur, who has been coordinating targeted killings of retired assassins. This second cour of Season 1 moves from the earlier Order confrontations into full-scale undercover work inside the academy that shaped Sakamoto.