Log Horizon: West Wind Brigade

Log Horizon - West Wind Brigade is a spin-off manga of the Log Horizon light novels, revolving around the titular guild.

Synopsis
The manga begins after the Apocalypse has sucked everyone playing Elder Tale into the game. Soujiro Seta, guild master of the West Wind Brigade is the first one among himself, Isami, and Nazuna to awaken. As he looks around confusedly, other players who had also awoken start creating a ruckus, all panicking and confused by the situation. After the two members of his guild that are with him awaken, they end up going into the forest to assist Kawara, who had gone in to chase after two new players. Successfully defending the new players and experiencing fighting in the world of Elder Tale for the first time, D.D.D shows up to pick up the two kids. Afterwards, the four West Wind members return to their guild hall.

Conflicts with the Light Novel

 * In chapter 14, Isami uses Soujiro's Phantasmal katana. However, it has been stated in the light novel that it is impossible for a player to use a Phantasmal item if he or she is not the player who first acquired it.