Tokkabu - Manga
Summary
A club made to rehabilitate problem children through community service is in the area. That is the "Special Extracurricular Activity Club", nicknamed "Tokkabu"! A self-titled "Amateur Spy" who knows more about machines than anyone else and a childhood friend juvenile delinquent who prides herself in her crimes; together they should have begun their activities. However! Their president, Ninomiya Sawa, declares she wants to help the neighborhood as a hero! Little by little, the days of the gentle and passionate Trouble Buster begin.
... 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.