How NOT to Summon a Demon Lord (Light Novel), Volume 3

The third volume of an adventure with an earth-shakingly powerful Demon Lord (or at least someone who acts like one) taking on another world!
After being summoned to another world that looks almost exactly like the MMORPG he once played, Takuma Sakamoto now spends his days going on adventures with Rem Galleau, the black-furred Pantherian, and Shera L. Greenwood, the Elf princess, both of whom accidentally became enslaved... to him!? One day, he is suddenly approached by the Fallen, Edelgard,...