Commission for SCTrainFanatic (Patreon)

Whew, this one ended up taking a lot longer than I thought it would, but it is finally complete!  

The story behind this one, according to SCTrainFanatic, was that these girls suffered the misfortune of being on a bus that broke down in the middle of nowhere.  Of course, certain "needs" arose while they waited for  a replacement!  Being the only six women on the bus, most of them really didn't want to tend to this problem in front of the other passengers, and so they held it!  Ironically, the bus did have a bathroom, but seeing as they had no power, that meant the onboard water-pump didn't work --- so no toilet!  XD

Eventually, the need to pee graduated into an agonizing, dire emergency!  (Also likely after several trips by the men to the bushes.)  At which point, one of them persuaded the others to make the trek out a ways into the forest together so they could finally relieve themselves.

And thus: this scene!  X3