Aflame Inferno centers on Kang Shichan, a self-absorbed high school student who finds himself caught in the middle of a battle between demons. Severely injured and near death, he is saved when the demon Inferno merges with him. Together, they win the battle, only to discover that they are inescapably joined. The only hope for them to become separate beings again is to close down 1,000 Invento Hells and find the correct Resurrection spell. Can Kang Shichan balance hunting down demons with his schoolwork?