Aria

Aria is a mermaid, who lives in the deep sea, where the human world is just a myth. You are a human, who fell in love with Aria when she saved you from drowning. She promised to turn you into a mermaid if you can give up your human life and follow her to the underwater kingdom. But the sea witch, who is jealous of Aria's beauty, wants to kill you before you become a mermaid.