Log Horizon (2013)

S1E2 The Roka Encounter Battle

With thirty thousand players trapped in the game due to the Apocalypse, chaos ensues. Major guilds are seizing control of Akihabara, while outside the city, aggressive factions are targeting other players. A young woman from Marielle's "Crescent Moon Alliance" finds herself stranded in Susukino, far to the north, desperately in need of assistance. Although Shiroe feels a bit awkward about it, he resolves to take action and help her.