Kurono Crawford, a noble from the Cepheus Empire, harbors a remarkable secret—he hails from modern Japan. Armed with advanced knowledge and a unique set of values, he sets out to become the legendary Harem king. Cast aside by his superiors and tasked with leading a ragtag group of demi-humans like Minotaurs, Dwarfs, and Elves in a destitute fiefdom, Kurono is determined to restore his forces and rejuvenate the land using his unconventional expertise from another realm.