I've Fallen for You

I've Fallen For You is similar to Under The Power:
* there's a character with unknown royal origin
* a secret in the past that binds the ML and FL together
* the FL works for the police, she's doing forensic research
* the ML isn't impressed by the FL in the beginning

The differences:
* Under The Power has a slow burn romance, I've Fallen For You has romance right in the early years of the leading couple
* Under The Power is much darker with a real bad ass antagonist
* The father in Under The Power has done some shameful things, the father in I've Fallen For You is honest and supportive

I've Fallen For You and Dr. Cutie have similarities:
* the FL is more cute than pretty
* the FL falls first in love, later on the ML follows
* the FL hides her identity
* the ML and FL have childhood memories in which they play a role themselves without knowing this
The differences:
* Dr Cutie is a story of revenge, I've Fallen For You is a story of finding a lost love
* The girl in Dr Cutie disguises as a man, in I've Fallen For You she takes the identity of another bride
* In Dr Cutie two brothers are vying for the love of the FL, in I've Fallen For You it's a male harem

Ancient Detective focuses more on crime solving compared to I've Fallen For You. It also has a bit of mild romance in it.

Both are exaggerated comedies set in a historical period. The characters are all quirky and lovable with great chemistry.