Stopping by his hometown of Karasuna, Gareki runs into his old friend Tsubame, who asks him to help uncover the truth behind a string of murders that have recently been plaguing the town. Though the crew assumes that the murders were the doing of their mutant quarry, they catch Tsubame's younger brother, Yotaka, red-handed at the scene of the latest crime. Ordering the bewildered Nai and Gareki to escape, Yogi prepares to do battle with Yotaka, but this is one fight that can only end in heartbreak for Gareki...