Lucia is the new girl at school. She and her sister run a public bath that's all the rage. When Lucia meets a terrific-looking surfer boy, there's just one little problem: Lucia is a mermaid-not just any mermaid, but a princess on an important mission to save the seven seas from an evil force bent on taking control of the marine world. Such a responsibility doesn't leave much time for romance. But Lucia vows to protect her world and win the heart of handsome Kaito. (Source: Del Rey) *Note: Includes the one-shots Moonlight Goddess Diana (MOONLIGHT GODDESS ディアナ), Nude ni Natte (ヌードになって, Get Nude) and Cherry Blossom (チェリー ブロッサム), contained within Volume 7 of the manga.*

The series is, in essence, a compilation of many of the standard themes found in certain kinds of anime and manga series: childhood promises as the source of relationship drama, the influential yet shadowy Student Council, somewhat contrived scenarios designed to push the plot forward, mid-series "recaps" to remind viewers of previous events, and a sudden crisis that threatens to alienate the main characters and jeopardizes the outcome of the series. Kujibiki Unbalance is meant to be a very stereotypical series, serving as both an homage to and a parody of the kinds of series that the otaku would enjoy.