A high school boy, unfortunately caught up in an incident and pushed to the brink of despair, took his own life...or so it seemed. Having lost all memory, he awakens in another world and is taken in by a knight order, where he is named "Sieg." Sieg lives a peaceful life while undergoing training as a knight, but one day an event occurs that drastically changes his destiny... A dark fantasy in another world begins, where despair fuels the rise to power!