If you loved Cyborg She, try My Mighty Princess
A bridge between a film you've already seen and one most people haven't. My Mighty Princess has roughly 5.0× fewer votes than Cyborg She — it's a deeper cut, not a mainstream recommendation. Here's what they share, and what the second one does that the first one doesn't.
What they share
Both films are directed by Kwak Jae-yong, and they both carry the playful, tender mood tags, and they sit in Comedy / Romance territory. If that's the register that drew you to Cyborg She, the second film will land in a comparable space — through a different lens.
playfultender
What My Mighty Princess is
Martial arts gets in the way of love. So-hwi quits to pursue Joon-mo. Her skills are needed again.

