Malt Arcane is a "Tamer" whose ancestors are heroes of the human race. When Malt goes to defeat monsters, he is attacked by two low rank demon Succubi! When he activates his [Tame] skill on them, they both undergo a mysterious change... The Hero, now branded as a failure and exiled from his home, begins to explore the demon territory accompanied by the two Succubus, Filei and Miru...!