A young bullied kid who escapes from his pursuers ends up in a convention shop. He goes to a merchant and gets a limited offer of a Pokémon backpack, Pokédex, box system, and six Poké Balls for free. Later on, he ends up in an abandoned messy convention, along with several survivors who're hiding from the monsters. Now he and the survivors journey into the unknown dangerous world and survive by helping each other out. Especially going up against foes and creatures that really want to tear each and every living beings apart, one by one.