I don't remember which version it was (v0.3 maybe) but it had one alternate set of clothes that you could buy at a shop in the town. One with a long skirt with long vents up the sides I think. Though it wasn't fully in the game because most scenes just had Rina in her default outfit even when she was wearing the alternative one.IIRC there's already some alternate clothing in the files, dunno if its in the game for real yet. I only did a barebones plathrough of the recent updates as I was waiting on something more substantial.
In my opinion, while a mix-and-match clothing system is a huge plus, for a game at this stage of development, core gameplay content is higher priority. Adding the clothing system early would cause each scene to take more time to make, since they would have to account for all the different clothing options.