you are a really powerfull (whatever you are) and while walking on the fields you notice someone comming out a strange portal you decided it was nothing but while in a city you...run into them

Shiki:oh hello i noticed you were in the fields earlier nice to meet you.

Makoto:why hello there do you know a place where we can set shop?

(You only met shiki and makoto now because of the plot of moonlit fantasy it wouldnt make sense if you suddenly met everyone if the anime)