This book is about the great samurai Hattori Hanzo, who, on the verge of death, dreamed only of a quiet life and regretted that he was never able to experience all its charm. Before being sent to another world, a demon named Kailcifir appeared, who offered to make his wishes come true and persuaded our hero to enter into a contract, sending him to an age where peaceful skies reign. But what benefit does this give to the demon, and how the hero’s life developed, I propose to find out directly from reading.