Alright Yoshika, you made your point, but why in a Wal-Mart!?

I think they are at a (hot)spings rather than a supermarket, going by the clothing and Minna in the massage chair.
As to why? Well its Yoshika, that's about all the reason she needs :D
Although I'm trying to figure out if that pink thing above her head is her slipper, in which case she's slipped somehow, but only anime physics can say how ^^

Boobs in aisle 1

Erica:"Hey! You're not allowed in here!"

Honestly, why else would she be pointing THIS way rather than Lynne's way.