Log Horizon: Entaku Houkai

Third season of Log Horizon.

It's been a year since Shiroe and his friends were trapped in Akiba due to the Catastrophe. Their forging of the Round Table has brought order and prosperity to its people. But fracturing political alliances and the constant menace of the Genius monsters threaten to destabilize all they've fought for and built. Can faith be restored and they persevere, or is its destruction truly inevitable?

(Source: Funimation)