They said all "Circle K" and "Sunkus" convenience stores in Japan will be converted to "FamilyMart" brand by the summer of 2018.

Does this mean Yukari will be scouting in a Family Mart uniform from now on?

I like where this is going

Why is FamilyMart represented by Yuudachi, and the same with Harusame, though?

For starters FamilyMart Yuudachi was official and the author probably picked any other sister for the gag.

rom_collector said:

For starters FamilyMart Yuudachi was official and the author probably picked any other sister for the gag.

Well YuudachixHarusame was a strong ship alittle while back maybe thats why