Omo! After I was done writing I looked at your watchlist and you've seen a ton of dramas.I hope I'll suggest something you haven't tried yet!
Ok from what I understand you're looking for a female lead who is and acts like a grown woman around a grown man? And if there's a few hot scenes that's good too? Ok I have a few recommendations:
-Marriage not dating +1. Definitely not a virgin and its acknowledged in the drama but she refuses to take crap because of it.
- descendants of the sun
-cunning single lady
-discovery of romance
-I need romance 2
-Eternal love
- Que sera sera. If I'm not mistaken, she's innocent but is actively pursuing the guy.
- the happy loner
-scent of a woman