I still don't get it, this is not kisimoto's work?

no, its not. otherwise his name would be there.
one of his coworkers, who draw and lernt from and with him, has permission from kishimoto-san to create this story.

I see. Thank you

yea its not his work but he actually took over it now recently on the new chapters

Why's so sudden? I hope this is gonna change weekly (๑•ㅂ•)و✧

Im guessing because the person who was doing it i forgot his name but he dropped it or just passed it on to kishimoto