"i’m sure I’ll fall in love again... like this unstoppable love rain." yuna knows what being lovesick feels like but on the night of singing in the rain, she meets eunbi who makes her forget that sickness just for a little while. but she wasn't aware of the consequences that lay before her.

as kim yewon roams the sea, she finds herself in a situation she'd never thought to be in. a boat crash, sailors just barely surviving. so being the good mermaid she is, yewon tried her best to save them. turns out saving one of those sailors was the biggest mistake of her life. or was it?