A high school boy who was unfortunately caught in an incident and stood at the edge of despair took his own life... or so he thought. Having lost all his previous memories and waking up in another world, he was protected by the Order of Knights and named "Zieg." While accumulating training as a knight, Zieg spent his days peacefully, but one day, an event that would greatly change his fate occurred... The isekai dark fantasy of a boy who reaches the pinnacle of power by feeding on despair, begins!