Tantei wa Mou, Shindeiru. S02E05 - That Was Their Final Answer
Summary:
To counter SPES, Fubi and Char plot to eliminate Saikawa. Kimizuka, along with Noches, pursues them and successfully holds them off. When Char confronts them, she recalls how Siesta saved her in the past. Just as she points her gun at Noches, intending to kill him, Kimizuka reveals the secret Noches has been hiding.