romantic dramas with experienced FL?

Like, an FL who's already dated around, sexually experienced, had relationships, etc., isn't ashamed of it and the show treats it as fine and cool. Would especially love CDramas with this! (Doesn't count if it's just one prior attachment to a doomed love or whatever.)

I wasn't sure if you meant "one prior attachment to a doomed love" as just meaning a non-sexual relationship or not, so these are one relationship, but it was clearly a sexual one.

• His and Her Secrets (FL is older than the ML and married at the beginning. It could be assumed she had other relationships prior to that and there was an unfounded rumor about her being involved with her professor at school)
• Lost Track of Time (FL marries and is pregnant twice by the SML and then marries him again after her time travel do-over but ultimately ends up with the ML)
• Renascence (FL marries and is pregnant by the SML before the bodyswap, she ultimately marries and has a son with the ML)
• The Best Friend (FL is married and then he cheats on her and leaves her for her best friend, and she ends up with the SML)

And not Chinese but...

• Pachinko (FL has a relationship with the ML and gets pregnant, then marries the SML and has a second child by him)

 octopus_joy:

One prior relationship could be okay - ideally I would love a lady who's explicitly slept around a lot and enjoyed herself doing it (I know it's a tall order for a cdrama), but in general I do just want to get away from the omnipresent trope of the FL who's innocent/naive about love, even if she's older or mature in other ways.

Unfortunatley I can't think of any dramas that I could confidently say are probably what you're ideally looking / hoping for. But I've listed a bunch of romance dramas that might fit the broader scope of a FL who isn't completely naive and innocent when it comes to love. 

 octopus_joy:

Like, an FL who's already dated around, sexually experienced, had relationships, etc., isn't ashamed of it and the show treats it as fine and cool.

• +1 Love to Hate You - The FL has dated many, many men and slept with a lot of them. The dynamic is a bit odd though. They frame it as her mostly using her skills to punish men who were cheaters or abusive. The drama tries hard to be cool about her history. Sometimes it succeeds and sometimes it doesn't. 
• Search: WWW - The FL sleeps with the ML the day they meet (the vibes were right). He wanted to start a relationship and she wanted to move on and leave it as a one-night stand. iirc it's implied that she has experience dating and I think her ex might have been a recurring character (but I don't remember the details).
• Jealousy Incarnate - At one point in the story, the FL openly dates the ML and the SML simultaneously because she is torn between them. 

 octopus_joy:

Would especially love CDramas with this!

• Zhang Gong Zhu Zai Shang - The FL keeps a harem of handsome bodyguards, it's implied that she's experienced, and she is very confident in terms of flirting and taking the lead in romance and beyond.

In these noona romances, the FL dates / is married / gets back with her ex while the ML is in love with her and there is a strong implication that the FL is getting with the wrong guy(s) and not having a good time of it while "Mr. Right" is hiding in plain sight right under her nose:

• I Need Romance Season 3 
• Witch's Romance
• She Would Never Know - The ML reveals to the FL that her boyfriend is cheating on her.
• Ms. Perfect - The FL's husband is cheating on her. 
• Romance Is a Bonus Book - The FL is a divorced mom. Her ex cheated on her.
• Kimi wa Petto
• My Fated Boy
• I Hear Your Voice

The FL had a relationship with another man and got preganant by him but she is forced, in one sense or another, to marry the ML, who she ends up falling for:

• Empress Ki
• The King's Woman
• Marriage Contract

The FL only has one confirmed crappy prior relationship:

• The Imperial Doctress - The FL marries the SML but he turns out to be every kind of awful.
• On the Way to the Airport - The FL's husband is cheating on her, and she falls for another man.
• Why Her? - The FL's ex got her pregnant and it was very messy.
• Secret - The FL's ex got her pregnant and got her to take the fall for his crime  + go to prison in his place.
• In Time with You - FL was in a multi-year relationship with her toxic ex. She gets back together with him and he cheats on her.
• Fight for My Way - FL's ex cheated on her.
• Forecasting Love and Weather - The leads' exes cheated on them. The leads get drunk and sleep together early in the drama but the FL resists starting a relationship. 
• Wednesday 3:30 PM - The FL's ex cheated on her.
• Doom at Your Service - The FL's ex cheated on her.
• Nevertheless, - The FL's ex cheated on her.
• Across the Ocean to See You - The FL's ex-husband cheated on her.
• Oh My Venus - The FL's ex cheated on her with her best friend.
• Perfect Marriage Revenge - The FL's husband cheats on her with her best friend and the two of them plot to kill the FL.
• Suspicious Partner - The leads' exes cheated on them.
• You Are My Glory - The FL describes her ex as narcissistic. His flaws are mild compared to others on this list, but he wasn't a good boyfriend / partner. 
• I'm Not a Robot - The FL's ex wasn't a good boyfriend. 

 emeraldarrows:

Ah, well, in that case, possibly Secrets of the Shadow Sect - FL has a harem of men and it's implied/believed that she's involved with all of them (she does ultimately only end up with the ML).

Oh, thank you! A harem of men does sound great. I appreciate it!!

 octopus_joy:

Thank you again!!

You're welcome! I hope you find something that hits the spot :)