In both dramas - the female leads are hard working women supporting their childhood friend, in both men's goals [modern, or historical] for a career as an entertainer.

Both, probably came from the same morality tale. Both dramas are based on a mother's revenge plot - carried out by a slave raped in one series, and a woman used in the other drama. Where both girls are groomed by mom, to be in a relationship with the men believed to be the girls' biological fathers. All in the name of revenge - both overly long.

Both are sweet romantic dramas, with great families (female lead's) that nurture and support their daughters in who they love. Both male leads are enamored at first, and a slow burn to love.

One a documentary, the other a film adaptation of the real life events of the 13 members of the Thai youth soccer team trapped in Tham Luang Cave in 2018.

Both series have characters with mental illness. Both, delve into the lives of each of them. Highlighting issues the characters come across in their life journey. Both, develop freindship, understanding, and might be romantic. No spoilers.

Both series have an unexpected pregnancy, one drugged, and the other drunk. Both suffer controlling parents, and male created misunderstanding loops. With crying and anger being the main couples' story through most of both dramas. One right up and until the last episode, the other a few episodes sooner.

Both are historical dramas, with a similar story line, about a murder, criminal investigation, and mystery.

Both dramas, have precocious child characters. Both, have hidden child. Both with ML families that interfere maliciously before, and after time skip.

Both films, revolve around; High School rivalry, school gangs, action, street fights, delinquents, revenge, violence and crime.

Both dramas are based on deep-seeded past family revenge plots - carried out by a daughter in one series, and a son in the other drama. Both children set-out to take revenge on both of their father's enemies - their targets the families of those enemies. One target family has three brothers, and the other has three sisters. In both dramas, the siblings are apart of the plot.

Both are about a marriage of convenience contracted between the main couples.

Both (one to a lesser degree) have to deal with medical blindness and the caretaking of one of the main leads by the other lead.

Both have outside forces plotting against the relationship.

Both dramas have to deal with life struggles. Interference from outside a relationship, and misguided opinions from within. Both, come with sacrifices only seen from the outside. Because, both series are about soul mates, and what they think is important in their lives is not a hardship. It's their love, and their life.