Montecristo was a devil who, due to the betrayal of his subordinates, suffered defeat at the hand of humans.At the last moment, he was granted a final miracle.He succeeded in returning to the past before all of his misfortunes began.However, his body had shrunk in the process, and he was now the size of a small child…A demon, defeated by the world and abandoned by his subordinates…Knowing what the future had in store for him, he made up his mind.The only thing I can rely on… is the dungeon!And who the hell betrayed me anyway?!