As Leonhardt's planet is being invaded by what he calls 'aliens', his world receives a complement system to the already existing Skills' windows, its name is Gift.

For better or for worse, he ends up becoming a mixture of Dungeon Core and Dungeon Master. The problems starts when he discovers he can't have the [Monsters' Loyalty] and now has to depend on his low [Taming] Skill to make his creations obey him and hopefully survive between the clash of titans of Aliens agaisnt a new Race he never saw, the Ex-Phantasmas, hapenning outside of his dungeon.