Anime

And that's the 3rd person from the intro joining. And it looks like the 4th one is getting introduced next episode. So Kencho said he had no eaten in 3 days, I assume it means it really has been only 3 days since the zombie apocalypse started. I always assume time passes faster in these things, but I guess you need to get the main gang together quick as not all of them would be equipped for surviving solo.