emeraldarrows

Both are mini dramas with a contract relationship between the leads.
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Both are mini dramas in which the couple breaks up due to manipulation by the rich ML's relatives, and the FL, who is poor, gives birth to and raises their child alone. Five years later the couple crosses paths again and begin to grow close, raising their child, all while dealing with the ML's relatives.

Both are short length dramas in which the ML treats the FL coldly, blaming her for something she didn't do, and the two separate, with the FL giving birth to and raising their child alone. A few years later the ML finds her and their son and brings them back to his home. Both have rich ML/poor FL, a SML pursuing the FL, and scheming relatives of the ML.

Both are short length dramas in which a couple has a child together but due to the ML disliking/blaming her falsely, the two separate and the FL raises the child alone. Five years later, the ML re-enters the FL's life and starts raising their child as the couple grow closer.

It continues the story.
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In both dramas the ML has two personalities.
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Both are short length dramas in which the ML has two personalities.
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Both are short length dramas in which the ML has two personalities.
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Both are short length dramas with an assassin FL.
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Both are short length dramas that have a wedding in ep 1 and an assassin FL. While TBB appears to be much more comedic than TKIAR, I think they have a similar plot or vibe.

It continues the story.
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Both are short length dramas with a very similar feel. The main couple were forced into a marriage by their families and the ML who resents it is at first cruel and harsh toward the FL who is sweet-natured.