A Dungeon Core story, following a young man, who dies is reincarnated as a dungeon core, in another world. He quickly goes a little power insane, and starts killing things. One day he finds a goblin, tries to kill it, and the Goblin begs for his life before eventually informing the Mitchel, our dungeon core, that if a dungeon core doesn't receive a companion, usually a fairy, or spirit they will go insane. But nobody wants to companion with a murderous psycho so, instead the goblin will be his companion.