Flourish in Time (2021)

Similar between both dramas
+smart male lead
+ sweet female lead
+ school related drama
+ not real sibling, youth

In both, the FL et ML have grown together and considere each other as siblings until the romance appears. The ML is the first to understand that he loves his "sister".
The ML has a complicated family situation in both, but it is more complicated in FIT.
In both the ML is really good at studies when the FL is not and needs his help.
The ML is seen as really handsome by everyone and the FL has many rivals.

I think that FIT is better thanks to its better story and quality but EF is not a really bad drama either.

Both are youth dramas
Both have smart ML and not studious but lovable FL
Both have ML and SML that are a good match with the FL
Both have leads with insecurities that blinds them about their own good traits (ML is insecure because of his artificial leg and no good father in FIT while female thinks she's ugly in JEA)

School setting, sweet relationship between leads, ML is a good student and tutoring FL who is a poorer student. Their personalities are somewhat similar.

I thought of Flourish in Time while watching Summer again. Theres some similar vibes. Not just high school setting. The use of flashback when ML and FL leads were kids and FL is fiercely protective of ML.. and the kids version are real cute. FL is her most honest version with ML. Then theres d deskmates. FL became bestie with her deskmate. Friendship. School mates. First love.

Similar type of plot. It is also about a boy falling for a girl he knew from childhood and lived at the same place.

Both dramas have childhood bonds and growing together
Both dramas have a ML from an under-represented group (i.e. differently- abled - physical and mental )
Both dramas have sassy FL wanting to protect the ML
Both MLs are quiet and protect the FL in their own way
Both are school dramas.

School setting, sweet innocent romance, happy ending. The characters are very endearing and its a light, breezy watch.

Childhood friends to romance within a circle of friends/schoolmates. School setting. Both are sweet and mostly light youth dramas.

Both are youth dramas and have smart ML and not studious but lovable FL.
Friendship. School mates. First love.

young to adult series that focus on the realities of youth and family dynamics. such a good watch and highly recommended

School setting youth drama. Innocent (no kiss) light romance between leads. ML has an disability (prosthetic leg in FIT, heart condition in MD) which makes it hard for him to do some things his classmates do. FL is tough and quirky. Light, sweet, and feel good tone with a happy ending.

It's similar
In both dramas like the synopsis already said
They will turn from fake siblings to lovers .
Because of some accident both male leads become the fake brother of the female lead .

Both stories are about high school student life.
Both stories have a smart male lead.
These two shows are so similar in many ways like - crush, friendship, love, jealousy.

Smart main lead has hardship in childhood and is in care of another family. Although the other family is very good to ML, he/she continues to feel like outsider. However, ML finds his/her place in high school because the friends he/she makes.