Bride of the Century (2014)

Both dramas are focused on deceiving somebody who is rich, to gain something. The female protagonists deceive the main male protagonist by acting as someone else's' replacement. Eventually, both female and male protagonist will develop feelings for each other.

Fairy tale like story
Contract Marriage and Mystery surrounding Wedding day/night
Plots and Schemes, light melodrama
Modern and Traditional world with supernatural elements.

They both have a twin, one is evil and the other one is innocent/ good. The difference is that, in Nice witch they are biological twins whereas in Bride if the century , they’re not they just look alike. In NW the twin become ill and stayed in the hospital and ask the other twin to pretend to be her while she’s recovering whereas in BOEC the evil girl didn’t want to get married, so she ran away and the mother find out they is a look alike girl, which they give her money to pretend to be that girl and stay with her husband to be ( as it was arranged marriage). Overall both evil twins, wanted the man near the end because they were jealousy.

If you enjoyed the main story arc on Joong Won past in Master's Sun you'll enjoy Bride of the Century, it almost feels like a spin off.

In both, tthe husband/wife falls in love with the kind imposter while the real one tries to murder the imposter.

has the character "Jeremy/Lee Hong Gi" in the lead, both have the same vibe like the old kdramas or shoujo mangas, both are innocent love story between innocent characters, also has idols