Leads who knew eachother as kids reunite in a school setting. Female leads are both gym teachers and male leads are both rich businessmen. Bickering dynamic between them continues from childhood into adulthood all as romance ensues.

Both are about the female lead getting sucked into a novel she’s disappointed with. LGIEF’s FL is writing bad reviews when she enters, and TSS’s FL is writing fanfic to fix the issues she has when she enters. They go along with the story and develop a goofy/banter filled relationship with the second ML of the novels, which later develops into romance. MLs are both the ‘secret’ author of the novels in both.

Both of these series have very complex and intelligent writing in terms of framing suspicion. They'll have the viewer convinced of who the killer is based on what they've plainly laid out for us, only to then shock us and turn us on a new path towards someone else- again and again.

Both feature a love story between a blind woman and man who is a gangster/criminal with a scarred face.

Rich male lead feigns memory loss after an accident, poor female lead finds and 'takes care of' him, and they cohabitate while he 'recovers'.

Rich male lead feigns memory loss after an accident, poor female lead finds and 'takes care of' him , and they cohabitate while he 'recovers'.

Two people from different countries meet in Hong Kong, romance ensues.
They both also use english to communicate since neither know each other's language at first. Female leads make an effort to learn more of male leads's language.

Both star Son Hyun Joo and feature a strained father-son (or father figure) type relationship that results in crime and tragedy.

Leads who haven't seen each other since childhood reunite in adulthood, and initially believe each other to be half siblings. Female lead turns out to be unrelated (biologically) to the main family.

I've not seen the Korean Good Doctor but I know it's plot from the American remake. Lead characters are judged and the conversation of whether or not they should be allowed to perform surgery with their conditions is a prominent theme.

Hospital setting. Doctor male lead who is cold/reserved in personality, desperate to save female lead from their medical issues.

Hospital setting, female leads are medical staff that face discrimination in the workplace due to their own health issues. Both also feature a healing romance arc with a coworker.