The Kaii are lurking unseen in the depths. There are those who must confront it; they are known as Leaders. They are the pitiful first penguins, forced to protect humanity. Kino and Azu, two girls among the Leaders who don’t even know their own origins, set out today on another mission where death lurks just around the corner, dreaming of the day they will finally be free. A story of two girls burdened by their fate as they hunt down the Kaii!

(Source: Kurage Bunch, translated)