Both are mini dramas in which the FL is out for revenge against a husband or boyfriend who wronged her.
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Both are mini dramas in which the FL is cheated on and betrayed by her fiancée and becomes involved with a man who helps her with whom she has a past connection.
Both are mini dramas in which the FL is betrayed by her cheating/scheming boyfriend and embarks on a mission of revenge, in the process becoming romantically involved with a man who helped her.
Both are mini dramas in which the FL's boyfriend/fiancée cheats on her with her scheming sister, setting the FL down a path of revenge against her horrible family. In the process, she becomes involved with a man who helped her.
Both are mini dramas in which the FL is out for revenge against a husband or boyfriend who wronged her.
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