Keith's psychology becomes the entire show, and watching him break under pressure is genuinely uncomfortable in the best way. Koku's past resurfaces as something that actually matters, not just backstory filler. The 6-episode format means it moves at a sprint, which works until the plot logic starts folding in on itself, but fans of the first season won't care because the character work is the point here. This is a show that trusts you to follow its logic even when its logic doesn't quite follow.

Several months after the events of the first season, the world seems to have moved on. Keith is back with the Royal Police running his own investigation, while Koku and Yuna try to live a quiet, ordinary life. That peace does not last: the fallout from the Jaula Blanca experiments resurfaces when Kirisame, a lab mate of Koku's believed to be dead, suddenly appears. Keith is abducted, Killer B returns, and everyone is drawn into a conspiracy tied to the crown. This second season is a six-episode ONA that mixes action, mystery, psychological thriller and the supernatural.