I mean, yeah; the true goal is to complete the gallery, so having one in-game (albeit janky) is appreciated since I spent most off my time playing this game before the gallery and achievements were added. And it's nice to no longer be beholden to modders getting frustrated with the game's updates breaking their gallery mods just so I can see Shiori's and Hanna's asses again.
Then I have to double down on the suggestion I gave. Without spoiling anything, there's three girls that might interest you.
After 30+ days, go to the electronic store for one.
After 8+ days with decent physical stat go to the gym and work hard a few times. Once you unlock Ayesha on a Wednesday, go on a date and choose to take the shortcut (don't go on a date in Summer though).
Play Gamer Bree for another side one (honestly reminds me of Summertime Eve, though a bit more awkward)
I also wonder whether Morgan fits your type (you need to go to the Cinema before Kleio calls you).
Lastly, the reason I am doubling down on the suggestion is so you get to start with the 20k needed for the Sportscar. Who knows if anything changes for Kleio then.
Funny you don't get the car back if she leaves, perhaps you could take care of this rare situation/bug
Andrealphus (a call from the shop?)