Warden of the Sky (2017)

- Both have Protective ML
-Both are Action Romance
- Live together
-Both have Stubborn ML
-Both have Possessive ML
- Both have Badass ML
- Both have funny supporting characters

Both dramas have the same actors playing the main leads. Both romance and in the beginning both times the pra’ek saves the nang’ek.

both FL has to marry defense officer to hide their identity and avoid assassinated by bad guy
in Yeut Fah Ha Pigat Ruk FL (dumb FL always make trouble)is researcher of cancer vaccination project NADIA ML is air force officer who appointed as her bodyguard and fake husband. as well as in The Crown Princess FL(strong FL) is heir of crown of hyrosis island and ML is navy officer and fake husband of her

as comparison to the crown princess , yeut fah ha pigat ruk leads are childish (bickering)

they are the same series except the main character role is shifted. There are times when they have combined missions or they crossover to each other's plot.

They are similar because,
Firstly, both are story of a person who's work is serving his country.
Secondly, male lead fall in love and that girl helped him in his work.

Same goes to other Paragit Ruk series.