Board Thread:Questions and Answers/@comment-25331521-20160731030946

I read here http://crazy-over-anime.blogspot.fr/2010/06/mangaka-profile-kubo-tite.html and I remember reading it on other pages that Kubo drew a first one-shot named "Fire in the sky" before Ultra Unholy Hearted Machine, but I can find anything about it. Does this one shot really exists ? Where can I find it ? Can at least someone tell me what it is about ? 