With the power of an interdimensional pearl, the guardians of Nazarick and the Seven Shadows of Shadow Garden accompany their respective masters to a seemingly urgent meeting being held between the two. However, as usual, things are not what they seem...

In Yggdrasil, the Ainz Ooal Gown and Shadow Garden Guilds were rivals as far as was known. With the notice of the end of the game, only the masters of both guilds stayed until the end of the game closure. Will the rivalry between the two continue even when it is no longer a game? One intends to conquer this world. The other one... he just wants to Ascend as a True Shadow Eminence.