The relationships in both dramas follow a similar growth trajectories. Both feature first love conflicts. Both MLs are older than their FLs. Both FLs face career path pressure from their parents.

Both dramas feature independent, hard-working professionals who change each other for the better. The MLs in both have a similar vibe, and both are great examples of opposites attract.

Both dramas feature smart, hardworking professionals with exceptional chemistry. Even while they are attracted to each other, they continue to pursue excellence in their respective careers.

These are actually very different dramas, but they share a strong reliance on chemistry and body language over dialogue to convey relationships and feelings. Both are also atypical romances in that both FLs are married and not to the MLs (though the marriage in Past Lives is very stable). Both demonstrate that fate is determined by one's own decisions.