Jack was summoned to another world that seems to resemble a lot to the Virtual Reality Massive Multiplayer Online Game that he is constantly playing, Yggdrasil Online.

The summoner was none other than Vampire Lordess Alexias de Astrid III. The daughter of Demon Marquis Raiou-jin and Southern Vampire Lordess Aeryn De Astrid. Watched as he slowly helps her to fight for the position of heir within the Noble Demon Family, and slowly conquer the entirety of the demon world.