Levius est

Levius/est (レビウス エスト) is a manga written and illustrated by Haruhisa Nakata.

Plot
In the 19th century empire after the war, rose "mechanical boxing" which involved people who had had their bodies modified. Under his uncle's tutelage, Levius, a lonely youth who lost his father in the war and whose mother is in a coma, enters the mechanical boxing scene...