From Viz:
It’s the 19th century, and the world has entered the Era of Rebirth, recovering from the devastating flames of war. The sport of mechanical martial arts has galvanized the nations. Cybernetically augmented fighters turn their blood into steam and their bodies into brutal fighting and killing machines. Young Levius is one of those arena battlers, hell-bent on winning in order to simply survive.

Levius was originally published in IKKI magazine. The story of the series continues now to Ultra Jump magazine, and it is known as Levius/est.