Triage X
Summary
At first glance, Arashi Mikami appears to be a normal, albeit socially awkward, 17 year old high school student. However, he's actually part of a secret vigilante organization known as Black Label, a group dedicated to executing power-hungry criminals the law refuses to deal with. Unfortunately, taking down a crime lord isn't always an easy task, and there are bound to be consequences for any action... This is the action-packed story of the trials of Arashi and the people close to him.
... and the second season of the Anime did a better job of pacing than I thought they would. I think they moved the Elf village arc from before hostilities with the Principality began to the inter-war period, aka the start of the second season, and used that to pad it out. Good call if that's what they did. In any event. Good season.