we are the 7mermaids princess from different countries and have a special ability to destroy the evil person who wants to take over our countries and want to rule over us....

the pink mermaid is the cute and her name is nanami Luchia

the girl who wanted to go to the human world because she loves the people who are on the land.

the blue mermaid is the sweet and kind and her name is hanon hosho. she like the handsome guy who ever she sees..

the green mermaid is the kind of cool and doesn't talk too much with anyone (always want to be alone).

the orange mermaid is like she is goddess and know about love..

the purple and indigo mermaid are sisters who was born and ruled the didn't countries but they have very close bond to each other

Lucia Nanami, the mermaid princess of the North Pacific Ocean, sets out on land to find the boy that she had saved from a tsunami wave seven years before the beginning of the story, to whom she fell in love and had entrusted her pink pearl. She eventually finds the boy: a teenage surfer named Kaito Dōmoto. However, Kaito does not recognize Lucia in her human form. She cannot directly tell Kaito who she really is; otherwise, according to mermaid legend, she would turn into bubbles and disappear. Lucia tries to convince Kaito into figuring out who she really is (since the legend doesn't say anything about the other person discovering a mermaid's true identity by him or her self).

At the same time, Lucia has been told that a group of water demons have invaded the sea world and she must gather six other Mermaid Princesses and their pearls to bring back the legendary goddess Aqua Regina to stop them. To fulfill this, she joins forces with Hanon and Rina, the Mermaid Princesses who came up to dry land, use their pearls, turn into singing Teen idols, and use their voices as an offensive power. After the water demons fail, the Black Beauty Sisters show up to steal the show. The Mermaid Princesses believe in themselves and believe they can defeat the Black Beauty Sisters, which they do.

Luchia and hanon are in the bath, when luchia shows off the new ring she made. Luchia gives the other one to Hanon as the symbol of their friendship. Luchia decides to make another one for new exchange student (Rina)

the girls get out of the bath tub and then Hanon starts talking about the new girl and lack of communication skills when Luchia decides that she will become friends with Rina.

Hanon leaves the room, while Nikora and hippo comes in. Nikora talk with luchia about the new disasters happening in the oceans. Hippo warns Luchia about the possibility that the other mermaids could be captured, when Luchia's towel (that was covering her body) accidently drops to the floor. Luchia exclaims that she will save the other princesses and defeats the enemies.

Luchia is walking down the stairs when she sees Tarou playing the piano and hanon is standing next right to him. Luchia then goes outside and sees(to her shock) Kaito and Rina are together. Lucia thinks they are missing due to the angle she is standing at and drops the friendship rings. she misunderstand the situation and looks in horror. Rina starts proclaimed that Kaito is “evil”and a “devil” leaving him confused and a bit annoyed. Rina walks away, while Kaito picks up the ring that was lying on the ground.

Hanon and luchia are sitting on some stairs, while Lucia was looking sadly at the ground.

Hanon suggested that it might be a misunderstanding and shows her the new concert tickets that tarou gave her.