Both are :
- Revenger dramas with time travel.
- The Female Lead travels to the past to save her past-self and change her fate.
- Swidler husband.
- The best friend is an accomplice of the swindler husband.
Both involve someone from the future time traveling to the past to try to prevent the FL from her future fate of a horrible marriage and her death. Both dramas have a similar vibe and relationship between the main characters,
