Instead of the Dursley's, Harry has Luchia Nanami and Kaito Domoto adopt him as their son. Dumbledore isn't pleased, especially when two Mermaid Princesses were coming with him to Hogwarts.

During Harry's fifth year at Hogwarts, the Wizarding World finds itself under attack by what they thought were merely muggle fairytales. EDIT: Also, there will be the occasional romance/existing couple popping up. Including same gender relationships.

Voldemort plans to use the mermaids' pearls to gain power. Kaito and Luchia's twin son and daughter along with some other mermaid's kids infiltrate Hogwarts to find the stolen pearls. They meet friends who aid them in searching for Voldemort.

Don't worry, I'm working on the title. Basically crosses over Harry Potter with my new favorite anime, Mermaid Melody. Wanna know more? Well, then, read.