FL's SO or Ex (Not the ML) Cheats
Before she gets with the ML, the FL's boyfriend or husband cheats on her.
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![Derailment]()
1. Derailment
Chinese Drama - 2023, 30 episodes
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![In Time with You]()
2. In Time with You
Taiwanese Drama - 2011, 13 episodes
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![Fight for My Way]()
3. Fight for My Way
Korean Drama - 2017, 16 episodes
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![She Would Never Know]()
4. She Would Never Know
Korean Drama - 2021, 16 episodes
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![True Beauty]()
5. True Beauty
Korean Drama - 2020, 16 episodes
TBC
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![Forecasting Love and Weather]()
6. Forecasting Love and Weather
Korean Drama - 2022, 16 episodes
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![Wednesday 3:30 PM]()
7. Wednesday 3:30 PM
Korean Drama - 2017, 15 episodes
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![Romance Is a Bonus Book]()
8. Romance Is a Bonus Book
Korean Drama - 2019, 16 episodes
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![Doom at Your Service]()
9. Doom at Your Service
Korean Drama - 2021, 16 episodes
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![Nevertheless,]()
10. Nevertheless,
Korean Drama - 2021, 10 episodes
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![Across the Ocean to See You]()
11. Across the Ocean to See You
Chinese Drama - 2017, 44 episodes
The ML's SO also cheats on him
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![Only for Love]()
12. Only for Love
Chinese Drama - 2023, 36 episodes
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![Kimi wa Petto]()
13. Kimi wa Petto
Japanese Drama - 2017, 16 episodes
The FL's boyfriend at the beginning of the drama breaks up with her (she jumps in and breaks up with him first but only because she knows he's about to do it) because he has another girl he wants to marry.
The SFL becomes the FL's boyfriend's "pet" (same set up that the FL and ML have). When the FL finds out, she realizes that keeping a person as a pet is, at the very least, a way of cheating on your partner emotionally if not physically.
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![Oh My Venus]()
14. Oh My Venus
Korean Drama - 2015, 16 episodes
The FL's boyfriend of 15 years dumps her and she catches him with her former best friend shortly after. It's implied that he broke up with the FL because of the friend.
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![Melting Me Softly]()
15. Melting Me Softly
Korean Drama - 2019, 16 episodes
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![My P.S. Partner]()
16. My P.S. Partner
Korean Movie - 2012
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![Ms. Perfect]()
17. Ms. Perfect
Korean Drama - 2017, 20 episodes
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![Perfect Marriage Revenge]()
18. Perfect Marriage Revenge
Korean Drama - 2023, 12 episodes
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![Suspicious Partner]()
19. Suspicious Partner
Korean Drama - 2017, 40 episodes
The ML's SO also cheats on him
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![Personal Taste]()
20. Personal Taste
Korean Drama - 2010, 16 episodes
Added based on someone else's comment because I don't actually remember the cheating storyline...
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![Hit the Top]()
21. Hit the Top
Korean Drama - 2017, 32 episodes
