Japanese anime television series

在被黑手党支配的街道艾尔盖斯托姆，经营着“便利屋”的沃里克和尼古拉斯，作为哪个组织也不属于的中立的存在接受着从便利杀人到护卫保镖等各种各样的委托，即使是警察和黑手党也对这2人刮目相看。有一天，他们在接受警察委托时。

在这条封闭的街道上，生存着正常人与具有超能力的“黄昏人种”。

持续连接的，过去与现在。重合的，使命与命运。

——在2人与1人相遇时，街道的混沌开始加速。

The final hour of the popular virtual reality game Yggdrasil has come. However, Momonga, a powerful wizard and master of the dark guild Ainz Ooal Gown, decides to spend his last few moments in the game as the servers begin to shut down. To his surprise, despite the clock having struck midnight, Momonga is still fully conscious as his character and, moreover, the non-player characters appear to have developed personalities of their own!

Confronted with this abnormal situation, Momonga commands his loyal servants to help him investigate and take control of this new world, with the hopes of figuring out what has caused this development and if there may be others in the same predicament.