The Demon King Of The Frontier Life, Reincarnated To Become The Strongest Mage ~The Former Demon King Who Grows Up While Being Loved Wants To Know The Human~

  In a certain frontier, there lived a mage known as ‘The Lone Demon King’.He was just a creature that never grew old, but he was loved by the villagers as something like a Guardian Deity.However, he wa...