- FL being bullied and insecure with her looks and found confident through make ups.
- stoic ML but actually a cutie ball when around FL
- 2nd ML are persistent and actually a good friend to the leads

from it's synopsis, both dramas focusedly on workplace romance even tho they are childhood sweethearts.
becoming frenemies on workplace, they began to find their old feelings back.

idk why when I started to watch Perfect and Casual, this is remind me of Because This is My First Life, for it's vibes and feelings.
ofc they are have similiarities, like:
+ Contractual Marriage, even tho the reason why they are married totally different
+ the ML is kinda of genius, quirky, and a cutie
+ the FL has their struggles with their (future) jobs, as Perfect and Casual's FL is still in college, but we'll see later

+ campus couple
+ cute light romcom
+ FL has much strenght and from sport major

Will add later as the drama goes on...

My Brother Loves Me too Much was mentioned on Go Ahead because the FL are in similiar position.
Even tho Go Ahead focused more on family issues, but both are good and fluff dramas to watch.

Both stories revolve around not-blooded relation siblings that has amazing father brought them up.
Golden Rainbow has more serious issues and kind of makjang, meanwhile Go Ahead is more light and funny to watch.
But both drama are heartwarming and show that not all unrelated by blood can't become sibling.

Fake Princess kinda remind me of The Romance of Hua Rong.
The FL is fiesty yet mischevious when it's come to breaking off their marriage.
I like how smart yet dummy the ML when it's come to love.
Both are lighthearted historical romcom drama.

I know these are totally different genre drama and storyline, but:

+ ML are oddly cute with his antics and sarcatic words, while the FL is kind and brave. they are kinda similiar in a different way tho!
+ The relationship between lead is strangely comedic yet romantic.
+ PETS, drama that has pets in the storyline always convice me.
+ Warm friendship. I love the girls friendship in both dramas.

Anyway, those two are my faves ^^

It's kinda remind me for the synopsis "from long-friends who watched each other relationships and ended up together."

+ both ML are from wealthy family but deserted somewhere
+ the FL is a beauty so many guy chase her out
+ FL and ML meet in an island, and the scenery is revolved around sea

+ both stories are revolved around cheating and marriage problems
+ the FL started to breakfree from her comfort zone, and meet someone to start warmed her up
+ i thought OWM is a POV of YDK in TWOM, because the wife of the man she is seeing is successful and has strong aura

+ Both FL are desperate to get pregnant
+ Harem Reserve
+ The stories revolved about three guy around FL that would became father of the baby.
+ Even tho I'm not really sure how the story on OMB goes, but I found both drama has pretty similiar. Both are comedic and fun to watch

I will add more later