The dawn of dungeon conquering. A group of boys who were once known as the strongest party is wiped out in an accident. Five years have passed since then. Low-difficulty dungeons have been developed as leisure facilities, and dungeon conquering has become a popular content that video streamers have flocked to join. In order to survive the tough world of showbiz, current top idol Shinonome Kanami also decides to become a broadcaster who seriously conquers dungeons. The man introduced by her sponsor as the best mentor is a rather unreliable-looking man, Amano Fuyuki. However, when they visit a dungeon together, an incident occurs right away, putting them in a desperate situation –!?

“But I’m powerless without you, my Master.” After being suddenly summoned to another world and saving that world from a crisis, high school students Wataru and Rumi have safely made it back to the real world. But the real world has been completely transformed! Dungeons are popping up and people have awakened their skills… It’s as if the real world is turning into the world they just left behind… A dungeon fantasy story where the returnees from another world, the tamer Wataru and his familiar Rumi, mow down everything in their way as the strongest combination that is closer than childhood friends but not quite lovers!

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...!