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Mother and Mom is literally the 'kid' version of SKY castle.
in both of those dramas the mothers are obsessed with their children's grades, and both of them show how it can be bad for their mental health
In sky castle, it's mostly about students studying for the college entrance exam
In Mother and Mom it's about kids (6-7 years old I think) studying to get in elementary school (i am a bit confused about the korean school system but they kept talking about getting in elementary school so I guess that's correct)
In sky castle, it has a more thriller vibe and it's way darker than in Mother and Mom.
In Mother and Mom there is romance and it's lighter.
Overall, if you liked the studying and academic pressure vibe of sky castle you'll like Mother and Mom although it could feel a little too lighter compared to Sky castle's vibe.
ANYWAYS MOTHER AND MOM IS SO GOOD AND UNDERRATED SO CMON JUST WATCH IT I PROMISE IT'LL BE INTERESTING

There aren't many things similar between these two but pyramid game definitely gave me sky castle vibes
Some of the scenes take place at school
There's a lot of pressure from the parents
The students kinda have to go against each other but some relationships are formed