Surplus Princess (2014)

Both star female leads who are mythological creatures that want to become human.

Supernatural elements

Magic

Female leads appear human but aren’t necessarily humans but supernatural beings

Humor warmth found family

Exaggerated reactions that are used to bring humour. Both main girls fall in love at first sight with a man for whom they'll enter "his own world" to win him over.

-Both main female lead are pretty strong
-Both main female lead likes someone at the beginning
-The guy that the Female lead liked realizes their feelings later on
-Love triangle
-Female lead slowly realizes feelings for other Male lead

Only difference is that the Female lead is a mermaid

In both the Rules of Love and Surplus Princess, a mermaid falls in love with a human. The mermaid saves the man when he falls into the water.

Both are packed with comedy and adult humour (Dasepo has much more though).

They both have a similar comedic feel while the main basis of the plot being on the romance itself. Similarly, you can find both have an interesting love triangle relationships.

They've completely different plot, but they both have a quircky heroine and peculiar secondary character; while Surplus Princess is more on the fairytale and Sweden Laundry more like a normal rom-com, they have a similar feel

Also about a mermaid falling in love with a human. Also a cute cast, beautiful, funny (and a bit sad) story + it's short but enough to fill you with good emotions.

*There are some similarities in the 1st episodes (the mall, the food...), perhaps there will be some more till the end of Legend of the blue sea.

Both dramas are really different because one is comedy and the other is melodrama but the stories are similar.
Both lead characters fight for their life and have a mission.

References of GD in both.
Both are funny and a nice short watch compared to longer dramas.
Both have a main character hiding a secret.

Both dramas involve a group of people living together. They're both funny and have great group dynamics. Go Go Waikiki is more nuanced and complex. Surplus Princess is fun and entertaining.

Two fantasy shows with a very assertive and (man-)crazy female lead. They're not the types to sulk or shy away when dealing with an evil second female lead. Instead they know how to stand up for themselves. The male leads are a bit different in the shows tho, but both are very likeable and not (unnecessarily) mean.

the main character in the booth drama have almost the same story :D

Due to family circumstances, high school student Miko Sonoda is forced to live at her uncle's boarding house. However, before she can arrive there, Miko is already met with a bad omen: while trying to find the place, she suspects that someone is following her! When her uncle comes to her rescue, the assumed stalker happens to be one of his tenants, leaving Miko embarrassed on her first day.

Miko learns that she will be living with five unique adults, including the accused man. Additionally, it turns out that he is Jun Matsunaga, a 29-year-old designer who seems to lose his temper easily. Having made such a humiliating first impression, Miko believes that only a miserable life awaits her. But in the presence of Jun, she comes to realize that living with adults is not so difficult after all—and there may even be enough room for romance.