ML and FL fall in love during the story, but have known each other a long time

Sounds a bit like Weightlifting Fairy KBJ

 Linus:

Sounds a bit like Weightlifting Fairy KBJ

I don't think so. Seems like he liked her for a long time or something. Maybe, but seen it anyway. Thanks though.

 Akemi96:

Maybe 30 but 17 could be one of this kind of dramas, I'm not pretty sure, but you can try it ^^ 

Nope. He liked her when they were teens before the story, but just doesn't know it's her.

Try:

• Reply  1994
• Something in the rain
• Hotaru no Hikari

I can't remember very well but maybe: While you were sleeping? Oh my venus?  Cinderella and the four knights? ah...it's difficult haha sorry TT

 leann123:

I'm looking for a specific type of show. The ML and FL have been friends and/or co-workers for along time, but never had any feelings for each other until the story. So no flashbacks where one falls for the other and has been in love with them for along time. Anything like that?

Love triangles a +.

Nope you didn't????

• Wednesday 3:30 PM - neighbours and friends (because their moms were best friends) since childhood; the drama begins when the ML returns from abroad; from what I remember the show suggests that they don't have any romantic feelings for each other until the drama storyline, and they both like other people at the start of the drama; no flashbacks

And maybe:

• School 2017 - classmates (I don't remember how many years they've been classmates for) and later friends / allies before falling for each other; no flashbacks related to their relationship (although there are flashbacks to a traumatic event they were both involved in)
• Ms. Perfect - the ML is the FL's superior at work (I forget the amount of time they worked together, but I think it was several months) before the ML starts to fall for the FL near the beginning of the drama; the romance isn't always the main focus in this drama
  
• Moon Lovers Scarlet Heart Ryeo - they are tentative friends / allies for a while before they fall for each other
• Healer - the leads were inseparable friends when they were very young but tragic events caused them to lose or be separated from their parents and each other; they don't recognize each other when they meet again (but later learn of their connection); the FL has slight crush on the ML's alter ego (Healer) from before the drama starts and the ML is intrigued by the FL from quite early on; as part of a mission, the ML goes undercover and works at the FL's office (Superman as Clark Kent at the Daily Planet style) and they develop romantic feelings for each other; there are flashbacks to their childhood but no flashbacks involving romantic feelings
• Something in the Rain - the ML is the younger brother of the FL's best friend; his mother died when he was young and his father remarried and moved abroad, so the FL's family has treated them as part of their family since they were little; they have a friendly almost-brother-and-sister relationship; although it's implied that the ML has liked the FL for a while (since years before the drama starts) there are no flashbacks and no absolute confirmation of that, and it could be interpreted that he just falls for her very quickly upon his return to Korea at the beginning of the drama

Possibly, but probably not:

• What's Wrong With Secretary Kim - similar to WFKBJ in that the leads met as children, but rather than either of them having an actual crush there's more of an innocent bond and the FL asks the ML to marry her when they grow up in a childish way; when they reunite as adults the FL doesn't fully remember their encounter or recognize the ML and the ML feels that he wants the FL at his side as his secretary, but doesn't realize that he has romantic feelings for the FL until the drama storyline unfolds nine years later; however, there are flashbacks to their previous encounters

• What's wrong with secretary Kim
• Fight my way
• 2 outs in the 9th inning