Ha Ni is a mermaid princess but longs for the human world when she sees and falls in love with a man. She has 100 days to make him fall in love with her so she can remain a human.

• Surplus Princess
• Jo Bo-Ah
• Park Ji-Soo
• Kim Seul-Gi
• Kim Min-Kyo
• Nam Ju-Hyuck
• Lee Sun-Kyu
• Jin Hee-Kyung
• Kim Jae-Hwa
• Han So-Young
• Jei
• On Joo-Wan
• Song Jae-Rim
• Ahn Kil-Kang