In this world, there are “entities,” beings with strange powers that cannot be explained. Turned humanoid through the experiments of Wonderdom Labs, slime catboy Ches and plant girl Avice are used as weapons by the scientists who raised them. But when a mysterious man with horns kidnaps them from their home in the labs, they must navigate the outside world for the first time in their lives, all while coming to terms with their traumatic upbringing.