Recommendations

Both are fun CRIME COMEDIES

Both have STRONG FEMALES (GoodCasting moreso than FieryPriest, but whilst not as many LEAD females, FP does have a strong female lead +strong females in supporting.
Female attorney, female detective etc.)

In both main lead is/has been a NIS agent (GC NIS agent lead is female, FP NIS agent lead is male)

Both have a "Good casting" XD and have great actors in roles

BEWARE!:
UNLIKE GoodCasting with romance tag,
FieryPriest has NO actual romance (other than girls crushing on lead but it going nowhere), but plot still very fun, and instead has many different types of very satisfying not romantic relationships/friendships etc.!

Stoic Male lead
Cute Bubbly female leads
Side character stories are cute and offer sufficient development to the main plot.

Has the same actors acting as a couple in both the main female lead gets a makeover the only difference is SDG is a litter on the darker side of a good Romantic comedy

Both the girls get major make overs. Both of the main guys realize how much they care about the female lead after said make over. Side note in both movies the main actors are dating in real life so they have amazing chemistry

I personally just love female centered spy plots and both Good Casting and Part-Time Spy share those similarities~

Call of the Country has a special place in my heart, it was one of the early "uncover female" kdrama I watched and now after 10 years we get something slightly similar in Good Casting

both are female driven, funny and full of awesome female characters, plus sismance, ie totally my type of drama ;p
also both have Lee Jong Hyuk

- Fantasy theme
- Great plot, strong performances
- Both characters live a worldwind romance and fight to be together
- Consistent storyline
- Flawless in every way

Both dramas are a remake of the older version. In your childhood if you've Watched handsom siblings then you might have watched Heavenly Sword and Dragon Slaying Sabre. They are good dramas to watch to remember your childhood.

Both dramas have a woman/girl that has t different age as the people in her class
Both dramas have a secret identity
Both dramas are comedy
And lastly both dramas the girls are really good fighters

Both are North Korean spies. Both want revenge on their loved ones murder. They both have the help of cops towards the end.

The sports aspect is similar so if you enjoyed that you could consider this a cdrama adaptation. Oh and the chemistry between the leads is similar to weightlifting fairy

Assistant x Singer
I found many similarities towards the concept of these two while I rewatched Accidentally in Love. Not only does the singer not get to sing the types of songs he likes but the assistant and singer both start out as disliking each other. Differences between these two is that Accidentally in Love is more comedic based while The Brightest Star in the Sky has a more serious feel.

Piang Chai Khon Nee Mai Chai Poo Wised (2016) is the remake of Samee Ngern Phon, has the same plot, same ending with Kimberley & James Ma

It has a similar vibe in regards to an adult noticing a child being abused by her mother and wanting to keep that child safe.

In MFN the ML ends up searching for her after she gets kidnapped. In Mother, the FL kidnaps the child (her student) to keep her safe from a child serial killer who's dating the child's mother.

In both shows the ML and FL put everything they have on the line to get to the child.