Nice little project! Good idea to start with something small as a learning experience. Overall, I enjoyed it. And the poses and angles of the sex scenes were great choices.
Now here's some pointers for future projects:
Technical:
The UI is a bit too simple. My name starts with L and I sometimes had trouble telling the speakers apart, since all names are blue and at the same position. And I bet K people have the same problem.
Thanks for using an older version of renpy. I can run this on my beloved outdated main machine without a problem.
Dialog:
The back and forth between Louise and the MC feels a lot like movie slop dialog. They always have the right line ready. It's like reading the script of a Michael Bay movie. People speak slower. Broken. Get emotional and misunderstand things. That's what makes a dialog natural. It's best to keep the intention of the characters in mind when writing a dialog. One liners don't make a story. They make a Schwarzenegger movie.
I don't know much about frog dirty talk, but I believe they don't scream about feces as much as burgers do during the act. From the research I did, it seems they prefer "putain". Or maybe "sacre [random thing]". Transliterating burger dirty talk directly into frog is the same mistake you'd find in poorly translated doujinshi, when suddenly asses start melting.
Korrina dropping her spaghetti so hard at the tower of mastery kinda breaks the illusion. It's like a doctor told her she's on her last eggs.
Some dialog feels stiff as fuck: Korrina - "That's admirable. Family is something very important to me, and I'm glad it's something others appreciate too." And other times it's just weird: MC - "This is actually a pretty good dub. I didn't actually see the movie yet, but it's still relatively new." A second pass on reading your script would benefit you a lot. Or maybe a proofreader/testreader.
Other times it was really good. As if you were speaking from experience. When they talked about not discussing politics during a date for example. ...Really wish I'd read that one sooner.
End of Line:
The problems I've mentioned don't need to be fixed for this project. This is a good start and something you can look back at and be proud of. And if this was your first step, then I'm already looking forward to your next one!