Natsuhiko Kyōgoku/Synopsis

Prologue: The Waterfall Spirit Lord's Waterfall/ Evening/ Light Rain
Kyōgoku is confronted by Ayatsuji and tells him that death will arrive to him and recalls the crimes Kyōgoku committed, but the government being unable to catch him due to the fact that he doesn't dirty his hands and uses other people to commit his crime. Ayatsuji then shows him the evidence, a coin, that Kyōgoku led the atrocity at the murder at the museum a while ago. He then explains how the murder take place. Ayatsuji then proceeds to tell Kyōgoku how he will die, a fatal drop from the falls will be the cause of his death. However, Kyōgoku tells Ayatsuji that the battle until that moment was simply a precursor to a ceremony and claims that Ayatsuji will never defeat him. He then mocks Ayatsuji and call him a loser and tells him to watch his prediction fail to come true. Kyōgoku then proceeds to fall down on the cliff himself, while laughing. The military police who surrounds the area rushes to the scene.

Chapter 3: Marshland / Afternoon / Cloudy
Kyōgoku welcomes Ayatsuji and praises him for doing a good job on the cathedral case. Ayatsuji then opens up about what Kyōgoku said at the waterfall - that the battle until that moment was only unveiling. Kyōgoku responds that after all the moment at the waterfall was his first taste of death. Kyōgoku then asks Ayatsuji if he heard about and tells him about it being a kind of water dwelling snake. Kyōgoku then makes a declaration that the next sacrifice will devoured by the Mizuchi and calls it a death threat. Ayatsuji gives Kyōgoku a warning that next time, he'll take much more care in killing him.

Just then, Kyōgoku welcomes the guests in his little game. Ayatsuji looks back and sees two people, both of them not in well state of thinking, each carrying a gun. Ayatsuji tells them to drop the gun however the two people continues to speak and tells something about a person paying for their daughter's operation as long as they do what they're told. Just as Ayatsuji tries to rush over them, both of them pulled the trigger and died. After the death, Kyōgoku mocks Ayatsuji for not being able to decipher the person who paid for the surgeries. Kyōgoku then bids goodbye and disappears from sight as Ayatsuji is left devastated at the scene.