Board Thread:Theories and Speculation/@comment-1512913-20190615111653/@comment-3279282-20190616162741

BerserkerPhantom wrote: That's not necessarily true for all mangaka, though. There are some that explicitly state "Oh this is a side story, it has no impact or relation to the events that are happening in the manga at the moment" and such.

Now guess what the "Gaiden" in "Kakashi Gaiden" means. :P