Maru has been tasked to find a place known as "Heaven" and is escorted by his "big sis" Kiruko Takehaya in a world where the Great Disaster occurred a number of years ago. Kiruko herself was trying to trace old acquaintances too. As they discover new clues and meet other survivors, they barely find any edible food in abandoned...

Beings known as "Gadoll" suddenly appeared wiping out most of mankind. In an effort to survive the mobile fortress Deca-Dence was built by soldiers known as "Gear" who serve The Power corporation, doing their best to fight them off and survive. One day, Natsume's father and his team set out on another expedition to explore the world...

In the post-apocalpyse world the cool headed, intelligent Chito and happy-go-lucky Yuuri are left to wander around a desserted city, doing their best to salvage what's left behind to survive. Animation and art isn't that impressive because it's mostly just rubble and desserted urban areas as you'd expect from a postapocalypse...