Well excuse them for having creativity. If you're so bothered by this then don't bothering reading it or commenting on it. Everyone would be happier if you just remained silent. :)
Well this was probably released before the main story... they often do that I think... releasing a story as a one shot and then continue it if it's successful enough
This was the original / one shot before tokyo ghoul retard
This was before Tokyo ghoul was released probs was just Σ(っ°Д °;)っ
I wish that they would stop bringing out one shots and spin offs of this manga that don't make since this was a waste of time .