Interesting. So she really adores modelling but her dad is so uptight he'd never consent to her owning books of models or even get into such a career...So the next best thing she can do is buy them secretly and store them elsewhere with someone...Trustworthy. Then it can just be passed off as 'his' stuff.
Also, what a nice boyfriend. Doing shady transactions in a shady building just to get the swimsuit his girlfriend wanted...Though of course, it also comes with the added benefit of him being able to see her wear it, so it was most definitely worth it.
That ending though! I'm certainly curious as to what he had chosen...
It's really funny to me to see the over the top old fashioned romance eyes in the female protagonist. They're in love and it works, but it really draws extra attention to the situation.