H2O Just Add Water (OCxMermaid Reader) Season 2

Leah (you) is back and ready for more mermaid adventures with her friends Cleo, Emma, and Rikki, and her boyfriend, Reed, also her brother, Lewis. The four original mermaids that's the way it's supposed to be, but what happens when two more girls soon to be mermaids join the pack, and one girl, gets in between Leah, and Reed.

P.S.- Go check out the first book.