Alien 9 Complete
Summary
Released in 2003, the Complete version of the manga, in addition to the three original volumes, includes three short stories corresponding to each one, as well as a lot of visual material.
Some extra countermeasures, breaking time, suprise baking, aliens, and a graduation party to end it off.
















... 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.