I see Author wanted a realistic but slightly positive vibe zombie apocalypse manga but then he snorted a line of coke and we get this instead. Mc is literally on crack, his friend probably the same and the female characters are abrasive as sandpaper. Nothing likeable whatsoever.
its obvious the mc is not in his right mind from all those years working at a black company then an apocalypse, dude had a mental breakdown already. thats what this is.