Oukoku e Tsuzuku Michi: Dorei Kenshi no Nariagari Eiyuutan

This is the story of a young slave gladiator in an underground arena. He doesn’t know about his past or how he got to where he is, only that his name is Aegir, and that he is strong. One day he kills the boss and escapes the arena, joining a band of mercenaries as a new recruit. During one mission,