Mermaid Melody Pichi Pichi Pitch, Bishoujo Senshi Sailor Moon SuperS Specials Recommendations
Filled with magical girls. There's just one different - these girls are mermaids! Singing melodies and fighting bad guys, they almost seem different from Sailor Moon and the scouts, but like Usagi, Lucia is deeply in love with Kaito. But if she reveals her true identity - that she's a mermaid - she'll turn into foam!
Really, Kaito and Lucia are both much more than they seem and even have a few more things in common with Momoru and Usagi than most expect.