I don't get how they can say that's impossible to go with Kurumi when she can literally go on the wheelchair alone and the zombies will ignore her, just rendezvous somewhere without the "burden", get the "burden" to go there and just go using other way.
But well, now that the cliffhanger is suggesting that Kurumi is kill, it doesn't matter, or the depressed college woman just've thinked what I've just put above...