Review of the light novel, Log Horizon, Volume 2 by Mamare Touno.
PURCHASE Log Horizon, Vol.2 (Amazon Affiliate Link)
From the Back Cover:
Even though peace has seemingly been restored to Akiba, unrest churns beneath its surface. Learning that two of his students–the twins Tohya and Minori–have been bound to an unscrupulous guild, Shiroe makes his bid to bring order to the lawless streets. Are his band of handpicked veterans up to the task…?