The threat of invasive species is no exception, even in a fantasy world!? Rokuroku of the Invasive Magical Creatures Countermeasures Division is investigating foreign magical creatures with the newly-appointed Ninin. Rokuroku is overwhelmed by the super-energetic elf girl Ninin, but...? Slimes, Carbuncles, Gargoyles... To save various magical creatures, the Invasive Magical Creatures Countermeasures Division sets out again today!!!