The date able girls do not currently have an ending, the plan is to have there stories conclude alongside the players story, whenever that happens. Also yes the fountain just has a very small chance of it's event triggering. That is one thing I am probably going to rework later down the road.
i got the fountain effect to trigger. it wasn't a lot but glad i saw it. also the fact that Beth's path can be missed is a bit of a shame, maybe make it so that it'll become harder to get her path the more you weight. that or add a way to have more save files in case you missed something important.
also Stephanie best girl, she's adorable
i also had some idea's.
the AE potion has to be used on Beth, since most of the images so far focus on her rear.
and maybe have the hyper potion be something for whoever you end up dating during the ending.