Deciding they need a bit of a break, Koutarou takes the girls out for a day of beetle hunting. An unexpected reunion, however, leads Kiriha to realize theres more than just beetles hiding in the mountains outside of Kisshouharukaze City. With things coming to a head between the radical and conservative factions, its finally time for Kiriha to take up arms for what she believes is right. With both the underground and the surface at risk, however, can anyone really win in this fight? Contains volumes 15-17.