Mrs. Cop (2015)

1. Both dramas deal with crime and investigation
2. In both exist corrupt officials who are willing to do anything for money, position/power
3. Villains in both dramas develop twisted personalities bec of how they were raised by their father
Personally, I enjoyed both of these dramas, they both kept me interested and both have amazing casts in which you'll love the protagonist and really hate the villains to their bones!

Both dramas are similar as they have police detectives & their struggle to fight against crime
This drama is also gives the same vibes of police investigation, procedures etc

Both female leads are single mother cops,
both showing the difficulty of keeping promises to their daughters, and the fear of the girls getting into danger.

Both have the theme of revenge for murder, in 'the guardian' its of the daughter, in 'mrs cop' its the father

Whilst 'mrs cop' is more lighthearted, 'the guardians' is more thrilling.

Not only does the main female protagonist care deeply for their child, they both feel deeply to bring justice to the world and shut criminals away. They also have their detective male leads who would rather run to their side than chase after a criminal.