- Country: South Korea
- Genres: Comedy, Drama, Fantasy
- Release: 2014-08-07
- Director: N/A
- Writers: N/A
- Language: Korean
- Stars: Jo Bo-ah , Jo Bo-ah , Joo-Wan On , Jae-rim Song , Ji-Soo Park , Nam Joo-hyuk , Kim Seul-gi , Kil-kang Ahn , Hee-kyung Jin , Jae-hwa Kim , Min-kyo Kim
- Runtime: 45 min
- Awards: 1 win & 1 nomination
- AKA: Ing-yeo-gong-ju (Korea) , The Idle Mermaid , Mermaid Princess , Surplus Princess (India) , Ingyeo Gongjoo (Korea) , Surplus Princess (Singapore) , インヨ姫 (Japan) , Surplus Princess (Germany) , Surplus Princess , Surplus Princess (Philippines) , The Mermaid , The Idle Mermaid (India)
- Plot: Ha Ni is a mermaid princess in the underwater Empire but she longs for the human world when she sees and falls in love with a man. She transforms into a human and follows Hyun Myung to live in a temporary house for people who are preparing for employment. The pragmatic Hyun Myung is trying to find a good paying job to provide him with a comfortable life. But will he be distracted by Ha Ni, who has just 100 days to make Hyun Myung fall in love with her so that she can remain a human?
- IMDB:tt4016396
Surplus Princess Cast · · · ALL
Jo Bo-ah
Ha Ni
Jae-rim Song
Kwon Shi-kyung
Joo-Wan On
Lee Hyun-myung
Kil-kang Ahn
Ahn Ma-nyeo
Kim Seul-gi
Ahn Hye-young
Nam Joo-hyuk
Park Dae-bak ("Big")
Park Ji-soo
Yoon Jin-ah
Hee-kyeong Moon
Yoon Jin-ah's mother
Min-kyo Kim
Do Ji-Yong