Become a Demon King from the Sword Hero

If melancholy is a talent, then Hoshino Mure must be gifted with it. One thunderstorm night, he was thinking about the meaning of life under a tree. Lightning will give the answer, from the left ear near the heart. After being struck by lightning and reduced to ashes, he traveled through time. He and a group of young people were summoned to the magical world by the empire's wizard, and they could only go back if they helped the empire defeat the devil. Good news: Talent is the strongest sword hero in hot-blooded shounen comics. Bad news: The Demon King's profession is the Necromancer and he is immune to physical damage. He was ineffective against the Demon King, but was framed by the leader of the Imperial Knights, and the king sent him to guard the border. From then on, Hoshino Mure started his life as a lord in another world from scratch... Three years later, the brave team saw him on the Demon King's throne and shouted: "The damn devil, he disguised himself as a sword hero in order to survive!"