As Ainz reaches out an supporting hand from Albedo, consoling him on his failure in preventing Shalltear's brainwashing, he immediately finds himself at the desk in an office space where all the NPCs are busy working, manning desks like a corporate facility. Ainz realizes that he in now the president of a company called Nazarick where all his employees are the NPCs from the Great Tomb of Nazarick. (thetvdb.com)