Kotoko receives a request for help from a giant snake, who is the guardian spirit of Tsukuna Swamp. It appears that a murderer named Tanio Aoi disposed of a body in the snake’s swamp, but there’s something that’s just not sitting right with the snake. After learning about Kuro’s powers, Kotoko asks Kuro to accompany her on this journey, but Kuro declines for a certain reason…

Kotoko is asked why a suspect had thrown a dead body into the Guardian’s swamp and she starts constructing a story. This ends up being a rather tragic tale about Tanio Aoi filled with love and regret that the Guardian is also shocked to hear. Two years later, random acts of violence were happening in Makurazaka City. The suspect seems to be the ghost of the former idol, Nanase Karin…