The anti heroic epic of Burgund

Decades ago, the "Demon Lord" led demons to invade the land of Burgund, and drove mankind almost to the brink of defeat. But the "Demon Lord" was defeated by a hero known as the "Heavenly Knight", who brought peace to the land. This is what is known in the land. But the truth is different. Because at the Juvren Knight Academy, the backward student Shun has a "Heavenly Knight" father, a "Demon Lord" mother, and sisters with dangerous ambitions and superhuman strength. As the sisters draw the w...