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This series is set in a universe where there are people who
live underwater in the ocean. They can
do that because of substance called “Ena” that they are born with. Ena coats the surface of their bodies, making them somewhat sparkly and allowing them to breathe underwater. It also
does cool things like absorb the moisture from their clothes when they come
onto land, so that they aren’t wearing wet clothes all the time. However, it needs water periodically, so they
cannot stay up in the air indefinitely without re-wetting their ena. Other than needing to get wet every so often
the sea folk can live fine on land also, and the sea and land peoples live side by side,
the land people making their livings from fishing the ocean.
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Hikari’s older sister, Akari, loves a land man named Itaru. This is forbidden by the sea people because a
child born between a land and sea person has no ena and cannot survive in the
ocean. Thus to love a land person causes
one to be exiled from the sea. But Akari
follows her heart, like a lot of sea people before her, and leaves the sea for Itaru. Miuna is Itaru’s daughter, and his first wife,
now dead, was also a sea person.
The sea
god gets angry at all the sea people that are being lost and decrees that all
the sea people must get ready to hibernate in their city under the sea, for an
untold number of years. Hikari-tachi don’t
want to hibernate and the five kids work with the land people to re-instate an
old ceremony called Ofunehiki in order to attempt to appease the sea god. The
old ceremony offers up to the sea god a wooden replica of a woman originally sacrificed to the sea
god.
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Five years pass. The sea is ice covered, the climate is cold
and snow is everywhere. Chisaki and
Tsumugu are following their individual careers, Chisaki living with Tsumugu and his
grandfather. Miuna and Sayu are now
middle school age. At this point, Hikari and Kaname wake up from hibernation and haven’t aged at
all. This means Chisaki and Tsumugu are five years older, and Miuna
and Sayu are now Hikari and Kaname’s age. Miuna and Sayu now go to school with Hikaru and Kaname and still
have the crushes on them. One night Miuna falls
into the sea and discovers she has ena after all and can live in the
ocean. Tsumugu during this time discovers that he also has ena, as his grandfather, like Miuna's mother, was a sea person. With Miuna's help, Hikari and Kaname
find Manaka and have to return her to the surface to save her because she loses
her ena.
They discover that when the sea god took Manaka he also took
from her her emotions and ability to love.
In an attempt to recover those things for Manaka, Hikari-tachi hold the Ofunehiki again with
the help of the land people. It looks at
first as though it will end like the first Ofunehiki with Miuna replacing Manaka as the sacrifice. But in the end the sea god learns something from
the land people, and everyone lives. The
sea people wake up, the seas begin to warm up, and all the children of mixed parentage
gain ena and the ability to live on both land and in the sea.
This series is visually gorgeous, all bright colors and
pretty animation style. In addition, the
music is good and the plot is definitely unique. Even though it was often pretty emotional, I
enjoyed watching it and recommend it.