Umi Monogatari: Anata ga Ite Kureta Koto

Umi Monogatari ~Anata ga Ite Kureta Koto~ (うみものがたり 〜あなたがいてくれたコト〜) is a 12 episode anime series, directed by Junichi Sato and produced by Zexcs. It began airing on Chubu-Nippon Broadcasting on June 24, 2009. An unaired 13th episode was featured in the final DVD volume, released on March 26, 2010.

The anime is based on a popular pachinko game manufactured by Sanyo Bussan.

The anime uses two theme songs. The opening theme is "violet" by Marble and the ending theme is "Tōmei na Inori" (透明な祈り) by Masumi Itō. Lantis has released three soundtracks for Umi Monogatari ~Anata ga Ite Kureta Koto~. The first, "violet", was released on July 23, 2009. The second, "Treasure!? ~Kimi to Deaeta koto~" (Treasure！～君と出逢えたコト～), was released on August 5, 2009. The third, "Tōmei na Inori" (透明な祈り), was released on August 26, 2009.

Plot
The story centers on Marin and Urin, two “pure” sisters who live alongside the fish in the sea, but yearn to be in the world beyond the water and above ground. One day, a beautiful ring falls in the middle of the sea, and Marin and Urin retrieve it. The two decide to leave their waterbound world for the first time to deliver the ring. After an arduous journey, they come across an isolated island where a high school girl named Kanon lives. The encounter between Marin and Kanon — the maiden of the sea and the maiden of the skies — awakens a hidden power as the world is threatened by an enveloping darkness.

Manga
Two manga adaptations of Umi Monogatari are currently being serialized in two different magazines by different publishers.

The first version, illustrated by Akira Katsuragi, is serialized in Mag Garden's Monthly Comic Blade magazine. The second version, illustrated by Tonmi Narihara, is being serialized in Futabasha's Comic High! magazine.