Histoire
After alien lifeforms known as "Trenchwalkers" land in Antarctica, they transform the planet, causing sea levels to rise by 70 meters and submerging cities like Tokyo. Furthermore, they begin converting Earth’s water into a divine substance, "Nectar," which proves fatal to those whose bodies cannot adapt to it. A handful of girls who can withstand the Nectar are chosen to board a submarine, equip special swimsuits, and head to the battlefield to reclaim our planet.
Synopsis via AniList (en anglais).
