Kazuki's black kakugane, which powers his Buso Renkin weapon and keeps him alive, will soon advance to the point where it begins draining life from others around him. Teaming up with his partner Tokiko, Kazuki leaves on a mission to find out more about the black kakugane in hopes of keeping this from happening. Meanwhile they encounter an elite group of Alchemist Warriors that have been assigned to hunt them down and kill them!
- Chapter 55: Rainy Emotions
- Chapter 56: The New Third
- Chapter 57: Runaway Start
- Chapter 58: Episode Zero
- Chapter 59: No Intention of Losing
- Chapter 60: Wind and Leaves
- Chapter 61: Who's the Monster?
- Chapter 62: Ikusabe Attacks
- Chapter 63: Gekisen, the Cross Spear