Helck, Vol. 5 (manga)

Helck continues to lay bare the harrowing tale of how he became the mighty - and disgraced - hero he is today. In the past, after his brother, Cless, sustained near-fatal injuries during an encounter with the Demon Lord, Helck set out to the Demon Lord’s castle in his stead. But what awaited him was a shocking revelation about demonkind that no human could ever believe.