The fallen (Overlord x OC) [Currently being Rewritten]

YGGDRASIL, a DMMO-RPG, released in 2126. The freedom it gave to the players made it so popular that at one point, the word DMMO-RPG was synonymous with YGGDRASIL. But, because of its 12 year run from 2126 to 2138 and the creator's financial problems, the shutdown of YGGDRASIL was announced, the veteran guilds who played the game from its starting days were filled with sadness. One of these veteran guilds was Ainz Ooal Gown, a guild made up of 42 heteromorphic players. Because of the players real life problems, all of them left, including the former guild master momonga, and the vice-guild master became his successor. He stayed, maintained and protected the guild from intruders, but he was filled to the brim with sadness. He was ready to say farewell to YGGDRASIL, only to be teleported to a new and mysterious world.

Disclaimer: I don't own any characters except for mine, all the originals belong to Maruyama Kugane, the author. Also, takes quite a lot of inspiration from Tri'ade Twilight of Nazarick.