Log Horizon (2013)

S1E1 The Apocalypse

Suddenly, Shiroe finds himself in the bustling city of Akihabara, trapped within the game "Elder Tale." Along with thirty thousand other Japanese players, the line between the virtual world and reality has vanished. In the midst of the confusion, Shiroe reconnects with his longtime friend Naotsugu. While they take a moment to regroup, they encounter a formidable assassin named Akatsuki, who has an important favor to ask of Shiroe...