Boukoku no Siegfried

Boukoku no Siegfried ~Das Nibelungenlied~ (亡国のジークフリート Das Nibelungenlied, Bōkoku no Jīkufurīto Das Nibelungenlied) is a Japanese manga series written and illustrated by AMANE Yoshikazu.

Plot
Based on The Song of the Nibelungs comes a manga about bravery, honor, and heroism.

"Knight"...the title given to powerful warriors who possess power, wisdom and class. Each knight holds onto certain beliefs which defines their knighthood, known as "honor". This story focuses on the Stolz Ritter (the Knight of Pride), Siegfried, and his journey, along with his Berühmte (sword), Balmung. As the last of his people, Siegfried will stop at nothing until he becomes a legendary knight whose story will last eternity. If his legend lives on forever, then so will the memory of his people...and that is his sole reason for going on.