When your desire includes eating the entrails of a demon, what else can you do but summon a delightful demon to taste? Makoto calls upon a demon to fulfill his every insane wish, and in exchange for eating the demon's entrails, Makoto will offer his life! Makoto has long been marginalized due to his strange hobbies and a sexual desire that others find disgusting. One day, on a whim, he tries a demon summoning ritual and manages to summon a duke from hell named J. Makoto sells his soul to the duke and begins a new life in hell as a monster. Living among so many unique demons, Makoto evolves in his new role. But he finds that he cannot ignore the feelings he has for the demon who brought him to hell, the beautiful but very twisted Duke J!