With Touringram as her guide, Yoko has left the shelter with android Airi to tour the places around Japan her older sister, Chitose had before sea levels had risen. Along the way, they meet various entities. As they travel and scavage for food, she dreams what it would have been like to spend time with her sister pre-apocalypse. First...

Strange outlines of bodies have been appearing all around Shinjuku etched as blocks into various surfaces, some claim they were "street art" someone was creating over night. Kaname Sudo soon finds the real reason behind the "art" as he accidentally takes part in "Darwin's Game", an app that grants its participants unique Sigil...