Genuinely one of the favorite episodes because how genius of a twist it is. Just as it seems like the solution is all too easy, the worst outcome becomes true as it’s quickly realized that Kamui is someone Ranpo was accidentally confiding. What’s makes the twist that much better is Ranpo only trust them because of Fukuzawa. His whole character is about following his gut and the one time he doesn’t, the worst case scenario ensues as a result.