Lin Xiao, a young man from the modern era, unexpectedly transmigrates into the Taisho era of the Demon Slayer world, afflicted with a terminal illness. To survive, he is forced to swallow the "Rumble-Rumble Fruit" in a desperate situation, gaining the "power of God" to control lightning. He tempers his body with thunder and creates his own "Thunder Breathing: True Form." Neither a member of the Demon Slayer Corps nor a demon, he walks the line between light and darkness as a third party, vowing to use the power of natural disasters to purge every demon in the world and uncover the ultimate meaning of his own existence.
· Key highlights: Modern thinking overwhelms the world, disaster-level powers dominate, deep emotional bonds, and a deconstruction and reshaping of the original worldbuilding.
