Eden's Ritter - Chapter 2 Gaiden - Rengoku no Maou Barberit Hen

A war sparked by lost love, unrelenting hatred, and unforgettable ecstasy—this conflict would later be known as the Great War of Lost Joy.
One week after the war began…
The Holy Galberia Empire, seemingly destroyed by Xenobite’s schemes, had risen again as the world’s strongest—and most malevolent—nation.
Hildegard, the Dragon Empress and sole survivor of the imperial family, declared war on the entire world. An army of inhuman beings marched forward, and lifeless corpses trampled the living.
This war had no justice, no cause, no pride, not even a shred of dignity. It wasn’t a war for dominance—it was a war for annihilation. A path not of conquest, but of destruction.
Princess Rutia of the Elven Kingdom of Silmaril, driven from her homeland by Galberia’s invasion, now races alone to stop Hildegard, her former ally turned the world’s greatest enemy.
Two souls who’ve lost what they loved most, two knights of Eden’s Ritter bound by love and hate—their fierce battle will decide the fate of the world.
This is a story of endings.
Beyond ecstasy lies only a scorching hellfire—a purgatory that will consume everything.

[Translated from dlsite]