Meh. Basically a poor man's version of "Hana To Uso To Makoto" without that series' strength of being suicidally depressing. I just didn't end up caring about this one when there's a way better version of the same concept that came out 7 years earlier. Wouldn't recommend. Read Hana To Uso To Makoto.
This was so disappointing, not a tragedy and characters are boring. If you like fluff then its for you. I know its a one-shot, but human girl sacrificies her life with no drawbacks just to get her life back as a zombie and they are together again.