The Villainess

Badass FL in both as it gives the same vibes & similar plot feel of the villainess
FL father's gets killed & later takes revenge for that she gets trained under a criminal boss
FL goes undercover for completing the mission assigned to her
Twist is she gets to know the truth about FL father's real killer

Both are about assassins trying to get back their lives. Also, they similarly condense the boundaries between the concept of hero and villain within the protagonist. However, Ichi the Killer is much more violent and explicit.

If you liked the Female Lead in "The Villainess" then you'd like main character in "Coin Locker Girl" as well it's like they're cut from the same cloth both are cold, ruthless, and fierce to say the least. Both have blood on their hands, and yet they have a heart.
The endings were even slightly similar.

Both are about badass FLs who are trained assassins fighting to reclaim a 'normal' life with someone they love while people from their past come back into their lives bringing trouble and secrets.

Both are revenge stories with a female lead. Both heroines have had their lives stolen from them and seek to right wrongs.

both trying to save themselves and the fam within a backstabbing surrounding. trying to fill full their mission in order to gain freedom. full of action.

The main role is a girl , there is revenge , A lot of action , martial arts, blood all around, guns,
people dying...

Both movies have a strong female lead who is good at beating/killing people and has a mysterious past.

Both were shot using really long takes. One Cut of the Dead is a comedy about a zombie movie shot in one take. The Villainess has long takes shot to give the illusion that it was done in one take. The Villainess is much more darker though.

A lots of bloody brutal killing. Both movies showing female fighters, female skill tough fights. Revenge, revenge, dangerous duty. Very dark

In The Debt Collector, Num is trying to leave his violent life behind. But his past eventually pulls him back into the criminal world.
similarly, In The Villainess, Sook-hee is given the possibility of a normal life, but her former employers, enemies, and secrets keep dragging her back into violence.

Both films are graphic and violent in nature. they follow the pattern of violent past -> attempt at a new life -> past catches up -> protagonist returns to violence.

Both female leads are badass AF and you will definitely enjoy Little Girl K as it's a three hour show which means they have more room to tell the story. Enjoy!

Badass Female Lead, who takes violent revenge without taking care off her self wellbeing. Both movie titles start with "The V..." :)

These films offer a blend of thrilling narratives, complex characters, and intense action sequences that should appeal to fans of "Mantis."

The story of a ruthless female assassin named Sook Hee, who from an early age has been taught to kill in Yanbian, China. She becomes a sleeper agent for South Korea's intelligence agency, who promises her freedom after 10 years of service. She dreams of having a different type of life, however, two men from her past make an unexpected appearance in her life, bringing out dark secrets from her past.