I'm sorry, I, Daoyu Gaoyue, am a scumbag.

Introduction: In the world of Demon Slayer, people have souls. A soul from another world, by chance, merged with the soul of an unlucky guy and survived. But he soon discovered that everything was not that simple. If ghosts ate the body, then what was he who could devour the soul? But are these important? Of course it's not important! Then, the next step is to abandon the shackles of morality and humanity and climb the steps to the end of the road! Or should I live under these shackles...