Okay, but why is there a window into the changing room? Not even one of those cheap frosting stikers on it.
There are curtains tbf.
I'm confused, why did she join another club? I thought her parents were strict and she has to study all the time?
None of her reasons for not being able to join the swimming club have actually changed so she probably just joined whatever her parents would let her, such as Calligraphy.
In my headcanon, Swim!Girl is also clearly interested in Stalker!Girl or she wouldn't have overlooked the creeping just for a new recruit to the club. She probably continues to hound her about not joining swim class and aggressively flirting for at least 2 anime seasons.