I am still sure that it is not official.

Hmm... wonder what this one is about? Seems to me like this should've been aired around Halloween, right?

Next up, a Christmas special...in April!! (I'm being facetious, but still, can't they get their timing right?)

Yeah its probably fanfiction.

It is an actual episode, just the English title is not official because fans of the series are using Google Translate but I honestly don’t believe Google Translate.