There's no magic involved (unless you count their chemistry 😉), but Goo Se Ra from Into the Ring/Memorials fits the bill! Into the Ring is a political satire/comedy, but don't let that put you off. It's also a hidden gem of a rom-com (one of the best, in my opinion). The FL is fierce, passionate, and pursues her own sense of justice (and the ML). The ML is no pushover, but he lets the FL push him around. She's the initiator and pursuer, but they equally support and love each other. Bonus: no noble idiocy or last 1/3 breakup! It's quirky, well-written, and beautifully filmed.

There’s no magic involved, but one of the strongest, most career-minded female leads that comes to mind is the titular character in Rookie Historian Gu Hae-ryung.

The drama has a relatively strong romance plot, and a handsome ML. But the show (in my memory)—and this is simply to set your expectations—follows a pretty traditional, political-scheming sageuk plot.

So, you have to enjoy sageuks, which is a real distance from Hotel del Luna, but our Rookie Historian knows exactly what she wants for the entire show.

Extraordinary You : She decided to change her destiny. It's not really magic but there is some fantasy elements.

Mr Sunshine : it's half - half. She's very fierce and know what she wants. But for the love story, she's new to it and the story doesn't focus so much on this part. Both female characters are fierce.

The King's Affection : She hides her identity so she needs to be strong. For the love story, they both took initiatives :p

Na Hee-do If 2321!
She was a teenager but was brave, bold and willing to fight for what she wants in her life. Her dedication to her sport was inspiring. And so was her approach to her crush/first love. She made the first move!
I pretend that the current timeline Hee-do that the drama showed us is a fake 😅

No magic in this drama, but in "Search: WWW", the female leads drive the story, their lives, relationships and the businesses they're in. The male leads aren't exactly pushovers, but they show great respect for the women and their decisions. Maybe WWW in the title isn't just world wide web, but also woman woman woman :)

My Girlfriend is a Gumiho - an oldie but goodie. Shin Min Ah's gumiho character knows what she wants...beef and Lee Seung Gi :D

I think that beanie could love Alchemy of Souls Season 2 (but Season 1 should be watched before).

Maybe Angel's Last Mission - I feel like this is one of those 'he fell first but she fell harder' kind of shows, and the FL's (played by Shin Hye-sun!!!) tenacity and unwaveringly bold love for the ML was 😍Talking about it makes me want to rewatch actually ahahaha!

ALSO, the secondary couple from Welcome to Waikiki 2 - the sister was bold and it complemented the SML's (he's not really the SML but he's one of the three main leads) golden retriever energy.

Last rec - the dynamic from It's Okay To Not Be Okay also seems to match what this beanie is looking for!

Females taking the lead ? Search WWW.
FL who knows what she wants: Sell your haunted house, Run on, Chicago typewriter, Love to hate you, Cheat on me of you can, Hello Monster, Doctor John, Into the ring.
In If you wish upon me, FL is also the first to declare and move. But I have erased this drama from my memory so I'm not sure I can recommend it.

Looking at the titles of my drama spreadsheet, it seems to me that a few actresses have several roles with more self-determination than the average FL: Jang Na Ra, Lee Se Young, Choi Soo Young.

The female leads in Hotel del Luna, It's Okay to Not Be Okay, and Itaewon Class are usually grouped together as bold and fierce and knowing what they want and putting the moves on the male leads (but I'll have to say I hated the female lead in Itaewon Class).

Kim Yuri of The Law Cafe is who immediately came to mind when I saw this topic. For whatever flaws the show might have, she is one of the boldest, most straight forward Kdrama heroines. She goes for what she wants, she's direct about her feelings and thoughts, and she took the lead in most situations.

Lee Bo-young in God's Gift: 14 Days leaps to mind.

Other bold and fierce women in kdramas I can think of include Lee Yu-ri in Father Is Strange and Lee Si-young in Lookout.

When I saw this topic, my immediate thought was strong and dynamic actresses who can handle a variety of challenges as the lead.

Lee Yu-Ri has put together a good string of bold characters in Becoming Witch, Lie after Lie and Spring Becomes Spring.

Jo Yeo Jeong has made an excellent career taking demanding and challenging roles in movies (Casa Amor, The Servant, Obsessed) and iconic characters TV series that are focused, driven and unusual (Babysitter, Ms. Perfect, Cheat on Me if You Can, High Class).

The OG of self-directed kdrama heroines is Kim Sam Soon, all the others came after her. But no magic and a tsundere male lead that some people have a hard time with.

I would suggest Nobody Knows. Kim Seo Hyung is brilliant there as competent detective on her team also as good mother figure to her neighbor’s kid.

Kim Sam Soon all the way - no contest!

Pretty much anything starring Kim Hye-Soo. My top picks would be Hyena, Under the Queen’s Umbrella, and Signal.

Two recent ones:
Brain Works
Gaus Electronics

Oh My Ghost has a fierce woman as well as a supernatural element: a man-hungry female ghost inhabits the body of a meek trainee chef and persistently tries to seduce her boss. Hilarious performances by Kim Seul-Gi (as the ghost) and Park Bo-Young (as the timid apprentice chef possessed by the ghost).

My Liberation Notes - Mi-Jeong gets straight to the point when she tells the passive Mr. Gu, "Worship me." (The fantasy is in the mind of the viewer who wishes she were Mi-Jeong!)

I chose AGENCY with Lee Bo Young as the badass female executive in an advertising agency.

If it’s just about strong female characters can we have the Ajumma from Healer. No romance in her life but she was proactive in her career choices and making a real difference in her industry, competing and consistently beating her rivals even when they played dirty.

In terms of magic and liking the ML first, I’d go with ANOTHER OH HAE-YOUNG. I wouldn’t call the FL strong in the typical sense, but I liked how she wasn’t the most likeable and was unafraid to show her emotions.

I’LL GO TO YOU WHEN THE WEATHER IS NICE. The drama showed the magic in the mundane but also the horrors too

Wow! Bold females abound in dramaland. Ones who take the lead?

The top of my list for you to check out is Mishil in Queen Seondeok. But I guess what you're looking for here is Bidam and Deokman's love story.

And then Ha Ji-won in Empress Ki. She literally took the lead here.

And Iron Empress. It's my favorite Chae Si-ra drama till date.

Bloody Heart : Kang Hanna and Park Ji-yeon. I expected Kang Hanna to deliver as usual.

The beauty of these three aforementioned is that it is packed with women who are 1.) not anachronistic in time, and they were other bunch of women taking minor or major roles in the same drama.

For other leading women dramas

Recipe For Farewell : Kim Seo-hyung.
Call It Love? : Lee Sung-kyung.
Mr. Queen : Shin Hye-sun.
Angel's Last Mission - Love : Shin Hye-sun.
The Devil's Judge : Kim Min-jung.
You Are My Spring : Seo Hyun-Jin (This is a personal favorite and you won't be disappointed).
Kiss Sixth Sense : Seo Ji-hye.( I think this fits well in what you're looking for).

Wait, no QUEEN INHYUN'S MAN (can be found subbed as QUEEN AND I on YT) mention yet? Heresy! Granted, FL is not as fierce or badass amazon-like as most ladies talked about here - more on the cute/bubbly side - but she certainly is confident and assertive about what she wants, be it her career, telling (and flipping) off her clingy ex or making impulsive bold moves on ML because he's way too hot to resist^^ There is a time travel and some magic as well. Absolute chemistry winner and just a fantastic romance show overall.

It hasn't aired yet but will be starting this week - See You In My 19th Life, unless they make DRASTIC changes to the webcomic (but based on the trailers I think her character will be the same).

Graceful Family also has the most badass FL I've seen.

Not magic, but a bit of horror (VERY SLIGHT) - go for Happiness. It's got one of the most kickass FL who takes charge (sometimes over the ML) and takes no prisoners. Han Yo Joo is fabulous.

Of course, The Glory, it's all about the female lead. Against female antagonist.

"Another miss oh" well I heard ppl saying FL was too clingy and childish in this show but after what happened to her I think she was brave and she knew what she wants not clingy or pathetic, but I think you should check it out yourself
Anyway "another miss oh" romance is one of my all time favourite