月の子（文庫版） Series by Reiko Shimizu

Will a half-mermaid, half-human girl bring an end to the feud between humanity and the mer-people - or bring about the destruction of all life on Earth? As a merman named Shona is returning to his birthplace to spawn, he meets a young human, Jimmy, who suffers from amnesia. Together, Jimmy and Shona set off to find the missing girl. Will they be able to avert a mysterious prophecy, or will finding the secret of Jimmy's identity delay them enough to set Earth on the path to destruction?

Shona is led to believe the unbelievablethat Jimmy is Benjamin, the half-mermaid half-human mentioned in the prophecies of destruction. But one problem remains: the prophecy foretells of a girl! The strange twins who exactly resemble Jimmy are the only ones who seem to know the full truth about the boy and the nature of his bizarre powers. Although they claim to be protecting him, they appear to have their own agenda. Only time will tell whether they are alliesor enemies in disguise.

The mystery heats up as Jimmy learns his secret destiny! The mer-people know that Earth's only hope is for the daughter of the original "Little Mermaid" to fall in love with Shona and bear his eggs. What they don't all believe is that Jimmy, a 12-year-old amnesiac, is that girl. After all, Shona was the only witness to Jimmy's startling transformation into the girl of his dreams, and he's decided to let the boy make his own choices... moreThe mystery heats up as Jimmy learns his secret destiny! The mer-people know that Earth's only hope is for the daughter of the original "Little Mermaid" to fall in love with Shona and bear his eggs. What they don't all believe is that Jimmy, a 12-year-old amnesiac, is that girl. After all, Shona was the only witness to Jimmy's startling transformation into the girl of his dreams, and he's decided to let the boy make his own choices. But not everyone is willing to take that chance#133;because if Jimmy picks his human best friend Art, the world is doomed! less

"Originally published in Japan in 1998 by Hakusensha, Inc., Tokyo."--T.p. verso.

Jimmy accepts that she'll grow up into a woman named Benjamin, but is shocked to discover that her gift of prophecy is shared by her brother Seth, when they both dream of a volcano the very night it erupts! They don't know that their psychic experience is connected to their brother Teruto's pact with the undersea witch. With only six months to convince Jimmy to abandon her hopes of falling in love with her human friend Art, Teruto is desperate -- and willing to do anything to stop her!