«Fifteen years ago, disaster struck human civilization, and now dangerous man-eating monsters roam the ravaged lands, posing an existential threat to the remaining survivors. Amid this turmoil, an isolated facility shelters children and nurtures them in peace. However, as a few among them find out about the world beyond the narrow periphery of their nursery's walls, their curiosity about it slowly grows.
Meanwhile, in the outside world, young survivors Maru and Kiruko band together to search for a special place called Heaven, each for their own reasons. Carrying past burdens and tragic secrets, the two hope to find answers to the cruelty they have experienced in their lives and in the world, which still remains in tatters.
«In a trash-filled apartment, 24-year-old Akira Tendou watches a zombie movie with lifeless, envious eyes. After spending three hard years at an exploitative corporation in Japan, his spirit is broken. He can't even muster the courage to confess his feelings to his beautiful co-worker Ootori. Then one morning, he stumbles upon his landlord eating lunch—which happens to be another tenant! The whole city's swarming with zombies, and even though he's running for his life, Akira has never felt more alive!