Both shows showcase people from different countries and their opinions and experiences on topics based on their cultures and how they view and differ from Korean culture.

Both dramas are about one of the leads falling in love with the other when they were younger and being reunited later on after the female lead has gained/lost weight. Her changed appearance also leads to mistaken identity/not remembering the other from before.

Both series are about an older office lady going abroad and meeting a younger man. Both of the women initially lie at the start of their relationships.

Both films focus on the relationship between an older married woman and a young university student. Art is also central to the characters.

Both dramas are about a career woman in her 30s who ends up in a relationship with a young co-worker 10 years her junior.

Both titles focus on a romance between first cousins and how they navigate their feelings for each other.

Both series focus on a forbidden romance between family members. Mistu no Aji features a uncle and niece who have fallen in love while 90 Days of Love they are first cousins.

Both series focus a smart female character who hides her intelligence to protect and enable her to maneuver in the restrictive and dangerous role women had in historical china.

Both series are about an older woman who has dedicated herself to her job and has let her romantic life suffer as result. They also involve a younger man as the love interest.

Both dramas are about the female lead learning to love herself as she transforms herself because she believes she is ugly. The male lead loves her regardless of her appearance but because of who she is as a person.

Both series are historical. They have a strong focus on the customs and daily life of the noble families during the time period. The main female lead is also intelligent and headstrong.

Both series involve the main male lead mistaking and continuing to view the main female lead as a bad, money hungry, duplicitous woman who seduces men to get ahead. Slowly the main male lead sees the female lead for who she is after putting her through many hardships.