In the era of "salt damage" when salt fills the city. Mana, who lives in Tokyo on the verge of collapse, picks up a collapsing young man, Ryoichi, carrying a large bag on his back. Together with Akiba, a man who acts like her guardian, she heads for Ryoichi's destination, the sea, but...? A complete comicalization of Hiro Arikawa's timeless masterpiece! The supreme entertainment opening presented by the same author-artist duo behind "Library War LOVE & WAR"!