The strongest demon king in history, Valvatos, who has his name etched in mythology, has lived his life as a king to the fullest and now seeks a peaceful life. Using reincarnation magic, he is reborn as a villager. Born thousands of years later, he lives as a villager named Ard Meteor, enjoying his new life. However, when he enrolls in a school at the urging of his parents, he discovers an unexpected fact. "What!? This magic is an impossible spell (Lost Magic)!?" "This one too!? That one and this one!? Most of the magic I use is impossible spells (Lost Magic)!?" Ard was reborn as an ordinary villager... but it was the 'ordinary' of the ancient world. In the modern era, where the power of magic has deteriorated over thousands of years, the techniques that Ard, an ordinary villager from the ancient world, can handle are far beyond the norm. Royal families try to elevate him as the next king, and his former subordinates target him. Despite these extraordinary circumstances, Ard pushes forward on his own path. "I just want to live as an ordinary villager! I can't go back to being a king!"