Episode 4: The Adventure of the Clouded Kokoro is the fourth episode of the game Dai Gyakuten Saiban: Naruhodō Ryūnosuke no Bōken and follows Ryūnosuke Naruhodō's second appearance in the English court. Following Megundal's acquittal and subsequent murder in the previous episode, Ryūnosuke immediately begins investigating another case. Hart Vortex asks him to defend Sōseki Natsume, whom no one will defend because he is Japanese. He once again meets the enigmatic Sherlock Holmes and his little biographer, Iris Watson.