The story begins with Teppei Takamiya, as he travels to China after years of living quietly in the fictional Kamui Island. He attempts to reunite with his brother Koutarou, who left Germany five years ago to study robotics at university. Unfortunately, no sooner than his brother begins an exhibition about an advanced form of machine, he's kidnapped by a mecha in the shape of a wasp and a servant of the Machine Empire. Teppei starts a chase, using a gauntlet known as the "Messiah Fist" to hold onto the wasp as it travels to a secretive base in the Gobi Desert which serves as the Empire's headquarters.
Getting thrown into a garbage heap and facing a cyborg he somehow is familiar with, Teppei's blood awakens a relic from the past; a kirin-type B't known only as "X" which, five years ago, was considered the most powerful B't in existence. Both are equally stubborn, although quite different in many ways, and after a few initial squabbles, X resolves to help Teppei in his quest to save his brother.
|Vol.3 Chapter 11: Act 4: Maria, The Girl At The Grave||August 30, 2016|
|Vol.3 Chapter 10: Act 3: Four Spirit Knights||August 30, 2016|
|Vol.3 Chapter 9: Act 2: The Colour of Heart||August 30, 2016|
|Vol.3 Chapter 8: Act 1: Oasis's Mirage||August 30, 2016|
|Vol.2 Chapter 7: Act 4: The Mystery of The Machine Emperor||August 30, 2016|
|Vol.2 Chapter 6: Act 3: Pirates of The Desert||August 30, 2016|
|Vol.2 Chapter 5: Act 2: The Route To Base||August 30, 2016|
|Vol.2 Chapter 4: Act 1: Phoenix! The Holy Book of Death||August 30, 2016|
|Vol.1 Chapter 3: Act 3: The Battle Begins||August 30, 2016|
|Vol.1 Chapter 2: Act 2: Resurrection of X!||August 30, 2016|
|Vol.1 Chapter 1: Act 1: Kotaro & Teppei||August 30, 2016|