After a peculiar incident involving bullies, Yuri Shibuya finds himself transported to a realm reminiscent of medieval Europe. To his astonishment, he learns he is destined to be the next Maoh, the ruler of the Mazoku race, due to his unique appearance. Unlike his predecessors, Yuri stands out for his compassion, sense of justice, and aversion to violence. As he grapples with his newfound role in a society on the brink of war between Mazoku and humans, Yuri must navigate political intrigue, cultural differences, and his own journey to become a benevolent leader in a time of escalating tensions.