In Korean dramas, the male lead is 20 years older than the female lead.
I'm not sure what movie you're referring to. However, if the male protagonist was 20 years older than the female protagonist, there were many movies and TV series that had such plots. The Gift of Room 7: The movie tells the story of a man who receives a mysterious letter and is involved in a strange incident. He meets a young woman and experiences a touching story together. The Temptation of the Wolf: This TV series tells the love story between a policeman over 40 years old and a young woman. The male lead is 20 years older than the female lead. 3 " Uncle ": This movie tells the story of a love story between an uncle over 50 years old and a young woman. The male lead is 20 years older than the female lead. These are just some examples. If there is more information, I will be able to answer your question more accurately.