ML has secret, secondary identity while pretending to be a different sort of personality (weak, playboy). In both, he unexpectently "acquires" the FL (as a wife vs. a maid) and falls in love with her.
the main lead acts stupid but is actually quite smart. the male leads in both shows have 2 different sides to them. He falls in love with someone he didn`t expect to and doesn`t want to admit it until she is put in danger.
MLmasked hero and dandy nobleman identities
FL in triangle with both identities
Fighting justice together
FL cohabitation status temporary will have to leave
Light whimsical tone to drama
Both dramas are fluffy love stories involving a ML that is pretending to be a playboy while secretly quite serious. FL is competent and knows martial arts and is investigating who was responsible for death of family members in the past. Both dramas also have secondary couples.
Both are light-hearted with some more serious moments, mystery/romance hybrid genres, and have an initially semi-antagonistic to frenemies to friends to lovers relationship between the main couple.
Both dramas have the ML with a false identity/secret that he uses to investigate an old case and find the truth about the past. FL is of lower status than the ML. Both are lighter dramas.