Lucia, Mermaid Princess of the North Pacific Ocean, sets out to land to find the boy she saved from a shipwreck seven years before the beginning of the story, the boy to whom she entrusted her pink pearl. She eventually found the boy: a surfer named Kaito Moto. But as the human form Lucia assumed, a girl named Lucia Nanami, bears very little resemblance to her mermaid form, Kaito cannot recognize her. She cannot tell Kaito who she really is; otherwise, according to mermaid…