where are we?

The overlord, one of the 45 supreme beings. during the last days of the guild, two players stayed behind. The first being Lord momonga (later named Ainzu Ūru Goun), their leader and undead guild master.

The other player was known as Mistress Rosemary, while her appearance was an elf. her race was known as the demonic elf, their skills in both healing and damage dealing with spells and staffs met no bounds to any other race or class.

now what will these two players do, then they find themselves in strange lands? where enemies could lurk around every corner.