Log Horizon: The West Wind Brigade, Vol. 9

"After a thief known as the Equipment Hunter suddenly appears in Akiba and attacks people, making off with their weapons and armor, the chase begins for the members of the West Wind Brigade. But just before that, the Equipment Hunter reveals his form...and he looks exactly like Soujiro...?! As the Knights of the Black Sword join the fray, an all-out war is about to begin"--Provided by publisher.