Action drama with physically strong leads

Hello, recently I watched Study Group. It has physically strong ML and negative lead. I would want to watch something where Male Lead and Female Lead are equally strong and have a one-on-one fight where they both are almost equal. I feel that Korean dramas are good with action sequences.

And also if it is possible I would want to see that FL hides her identity where people have no idea that she can fight well. And when she starts fighting they are surprised to see it.

 autumn iris:

Maybe:

• Tale of the Nine-Tailed 1938
• The Uncanny Counter (In the beginning ML received training from FL)

Thank you for the reply.

I have not watched Tale of the Nine-Tailed 1938 but have watched The Uncanny Counter Season1.

• The Legends - they're a battle couple when fighting side by side, and I'd say pretty equally matched when fighting each other. FL is hiding her identity for part of the drama (her spirit is sharing the body with a more fragile girl).
• Flower of Evil (both are strong, no real physical fight but FL does pull ML off a guy he's about to kill) 
• L.U.C.A.: The Beginning (possibly? FL and ML have a fight and she's quite strong but he does win it)

 Saygo:

• Military Prosecutor Doberman
• Alice, the Final Weapon
• Happiness
• Moving

Thank you for the reply.

I have watched the other three and didn't watch Alice, the Final Weapon.

 Lou:

+ flower of Evil
+ LUCA => BUT drop this drama on episode 8. The drama is absolutely amazing in the first 8 episodes and you will have a somewhat concluding end if you do that. But the last 4 episodes? I have no idea what happened to the writers because the drama goes from a solid 10++ to a -1. These episodes were a joke. Thus, drop at 8 onwards. 

My Name - kinda fits all you look for. All main characters are strong, FL hides her identity
Kill It 
Lawless Lawyer
Stealth Walker - Chinese drama,  both are strong, FL is undercover thus secret identity.
Vagabond  - FL is somewhat having a secret identity

Thank you for the reply.

I have an idea about the dramas mentioned.