This story is based on the "Century of Monsters" written in a small preface as the background of the story.
The story takes place n years later when monsters have become the new masters of the world and humans have been reduced to food.
The story of how a human woman with a special status who was adopted by a certain monster noble used herself and the surviving superhuman forces behind her as a bargaining chip, and on the condition of improving her treatment of humans, to help a third prince who was mixed with a monster to win the throne from his two brothers with pure blood and strength~~
Of course, what is always indispensable is the emotional entanglement between them =)