Both series involve a young, naive, and silly girl forced into a marriage with a serious, cold guy. She then has to learn to behave in a certain way as she is thrust into the public spotlight. In Goong, the guy is the crown prince while in Prime Minister and I he is the Prime Minister.

Both titles are about a woman who is in her early thirties worry about the direction her life needs to go. Marriage, career, and dead-end relationships are common themes and worries for the main women.

Both titles have the main character moving from the city to the countryside and coming into themselves. In Koko ni Aru Shiawase it is a man in his late twenties while in Amachan it is a teen aged girl.

Both movies are about two men who work in the same company falling in love. No Touching At All is much more serious while Same Difference has a comedic focus.

Both dramas are about two people who share a dark childhood. The main characters are both a police officer and someone involved in the underworld. In Ouroboros, the mains are secretly working together for revenge while in Kill It they are unaware of their shared past and are on opposite sides of a case.

Both are short films that focus on the relationship between 2 teen high school girls. The feelings and the little things people do for the people they care about are spotlighted.

Both dramas are focused on an older woman and younger man falling in love. Both relationships also begin with a mentor-mentee dynamic with the woman introducing the man into a new field of work. The guys are also artists.

Both series are about an older woman and younger man meeting abroad and sparking a romance. Encounter is slow-paced while Koi suru Hong Kong is fast-paced and action filled.

Both series are about women (who are quite oblivious most of the time) learning how to gain their confidence. They both also feature cute romances where the male lead helps her come into herself.

Both series are about women getting back into the workforce after taking off to focus on raising their families. They both have to start at a lower-level job then they previously occupied and their romantic interests are both younger men who are their superiors at work.

Both films are about a younger and older man falling in love. In both relationships, there are struggles and issues that the characters have to face and overcome in order to realize what is needed to be together.

Both series take place in Joseon and deal with the royal family and dark supernatural elements that are used for political purposes.