"This is what Alpha is after Delta, The world we must prevent from coming to ours..."

The Dark Biola is a world of ours except full of creatures of the Dark Biola, and the places are split into floating islands. Led by The creator and mastermind behind the Dark Biola, Zofia has watched it been opened in many ways since WW1 to The Great Crusade Wars of 1945 (Basically a war between the demons of hell and those who believed in religion, and Angels) even since 1985, but it wasn't until a group organization Alpha to awaken it and cause many breaches around Panthereolo, and all the other countries making this the greatest threat between the wars happening in this universe (Basically taking place in the same universe where the Panthereolo comics but years later in 2020-2021). It is up to Delta or the D.A.I.T (Delta Anomaly Investigation Team) To stop this world from opening

The Dark Biola used to be its own multiverse until Agent Gray Elise Salasa stopped it back when he was in it, now everything is just floating islands surrounded by the Undead, and other creatures that are dangerous to our world, including Zofia herself.