Both movies have unconventional plot that u would never come across anywhere else,FL was abused in the past, unusual relationship n romance.

Both movies have deep meaning,focus on psychology of the MC n plot line where ML was a murderer once, trying to adjust to the society ,is same.Many similarities along with same actor .

Murder n death involved, psychological n intense plot, manipulation , blackmail n high school premise etc

Both dramas r very funny n unconventional which maybe considered weird n creepy at times .Non fluffy but cute in a way n both r so much entertaining.

Both are slow paced, dreamy with calm male lead, moral teachings, learning, a good slice of life , school drama, repentance, character development.

Both are based on historical events,taxi plays important role,both are very emotional n adventurous with deep characters.

Similar themes.
Village,rural unity, injustice, revenge , crime , brutality, suppression, psychological.

The male leads are very similar, they both are poor, they r nice but have dark personality , can flip anytime,they both handle things silently n smartly . The female lead in both the movies are crazy too.
What makes both the movies most similar is the direction, they r both slow paced,heavy n dark, the economic n social differences r very well portrayed, with a deep meaning n what they can result into, ambience n interaction with people to solve the things.

There is Domestic violence where Wife saved by another man which leads to romance. Focus of this drama is affair but as its based on abuse so it cn b added.

Base of both stories r same ,both are historical.both movies depicted the result of gwangju incident on people n a person in particular.both r tragic

I think the second lead character is similar to the antagonist of this drama.both were emotionally void n commited crime .

The dramas are related to death of a little girl,mother sets out to seek revenge or avenge her child.time gap n repentance.