Doomsday Bodyguard: but Party a Doesn't Treat Me as a Human Being at All

What the hell did this god-man Party A send me? In the doomsday wasteland, escort Roger always encounters some strange things - locks without holes, sauce that can explode, and an ostrich that knows the way better than himself. He has long been accustomed to it, adhering to the principle of "If Party A doesn't treat me as a human being, then I don't treat me as a human being either", and his life has been just like this. Until he received a jar of talking ashes. From then on, troubles ensued.