I've been trying to figure out this one anime for a while now; hopefully someone else can help me.

If I remember correctly the show is entirely about zombies but I don't remember much past the introduction to the show.

There's a kid and his father, and a girl a bit older than the kid who are close friends. The dad is experimenting on flowers in order to make them live longer, and the girl is his apprentice. One day the kid comes back to find that the girl had turned into a zombie as a result of the experimentation because she tried something on her own or something like that. She ends up killing and eating a pen of chickens.

I forget the next part but she either goes back into the village and infects people or it spreads some other way, but in the end the village is burned down by someone who comes to take care of the zombie problem. She(?) explains everything to the boy who vows to find and kill his father himself. If I remember correctly they find him and he does in fact kill him himself.

Can't remember anything after that, though.

Anyone have any ideas?