Miss Mermaid, your tail is showing！

Sera, a mermaid, rescues a drowning man named Zane, but a single night with him costs her the silver hair, fishtail, and heart scale that bind her to the sea. Forced onto land to recover it, she takes a secretary job at Zane's company, only to discover that her best friend Lucy has been passing herself off as the hero who saved him. As Sera fends off workplace schemes and clashes with Lucy, she begins to fall for Zane, while a childhood friend hints at a truth that could change everything.