They might actually not be anywhere anymore. Each girl only has a few unique events implemented, and each unique scene can only be seen once. And if you pick the wrong option to where you miss out on affection points, you're just out of luck forever.
So yeah, this game, like with most other sandbox-style visual novels on Itch (that are far more complex than this one), is set up to where you can find the characters based on a combination of location, day of the week, and time of day. Except Morning and Afternoon are counted as the same thing in this case, so there are really only two times of day... and it's more like day beach/night beach are counted as separate locations, etc.
Except other sandbox-style visual novels have a system somewhere in the UI that shows you what locations they will be at certain weekday/time-of-day combinations. This one is simple enough that not having it would be forgivable, if not for one major issue: there is also no set pattern to their appearances like those other games have. Their appearances are hardcoded into a pseudo-random mess with no rhyme or reason aside from the majority of Caitlyn's scenes obviously being at the bar. Other games will typically have a character always be at a certain location on Monday and Wednesday mornings... etc, and if they are somewhere different from normal, that will be made clear through dialogue. Also, repeatable interactions are normally a thing...
The way everything works here is that each location/weekday/time combination has exactly one unique scene, after which you always get one of the RNG shorts from then on. With 6 day locations and 5 night and 7 days of the week, plus one additional unique scene the very first time you visit one of those 11, that is 11*8, for 88 total one-time scenes (most of which don't involve any of the girls, and some of which are basically the same as one of the RNG shorts), then RNG shorts in each of the slots you've already covered before. Exactly one of those scenes requires someone's affection to be above a certain level (every character is just extremely horny), and before you have enough you get the RNG shorts instead just as you would if you'd already seen the unique scene for that slot.
P.S. With this implementation, adding any new scenes will require either adding new locations or breaking existing saves, one or the other.