I hope you don't mind this, but...I'm going to start reviewing harshly. Please don't take offense! Take it as advice!

You need to give the chapters more feeling. Saying that 'everything will be explained later' is just an excuse that many authors use to get people to keep on reading. No. Get them interested immediately. The plot is what's keeping me on this and I want development, even though it's only like a prolouge.

The journal didn't really peak my interest. YOu have to describe it more. Lure me into thinking it is awesome. That's all I'm saying for now.

I was confused on why the character was nearly dying. Also, what is his name? The story could be written better, but you have me captivated on what's to come.

Awww, Nana is so innocent. I hope you develop the characters further.

Noooo! Some of the worst things happen on character's birthdays! I think your chapters need more...sentences? It pretty cool though.

Ooo, an apocalypse setting. The chapter was short, but now I'm interested!

Only one review? Well, here's another!

Well I do have to say that you have an interesting premise here. Yet your premise raises a lot of questions. But I'm sure that those questions will be answered with time.

Even for a prologue it's not a good idea to make it one huge paragraph. It makes it look bulk and un-readable. And frankly it makes me not want to read it. For later chapter I would suggest that you separate it a bit so it looks a bit more readable.

I personally think that you could go place with this story as I think that post apocalyptic worlds are awesome. So I wish you the best of luck with your story!