Marin and Urin are sea folk, people who live in a peaceful underwater world surrounded by bright fish and colorful coral. But one day, a beautiful ring falls from the "sky" - that dangerous place above the water - and the two girls decide to return the lovely trinket to its owner. While the surface world holds amazing wonders for the pair, it also hides a great darkness... a darkness that Urin accidentally unleashes when she opens a stone box at a local shrine. Now it's up to Marin, Urin, and their new friend Kanon to set things right again before that darkness swallows the entire world!
Director: Junichi Sato
Producer: 田坂秀将
No overview available.
18 episodes
Kanon Miyamori is looking forward to Summer vacation, and explains that she will be introducing the viewer to recommended locations on the island.
Runtime: 2 minKanon tells the viewer about the local shrine and a romantic dating spot.
Runtime: 2 minKanon discusses her daily routine and goes for a walk.
Runtime: 2 minKanon's childhood friend, Suzuki, talks about their friendship.
Runtime: 2 minWhile the tide is low, Kanon visits Kagero Island and goes exploring.
Runtime: 2 minKanon invites the viewer into her house for tea and a brief tour.
Runtime: 2 minOoshima talks about how she is the ideal woman of Amamiko Island.
Runtime: 2 minKanon takes us to the beach, but explains that she doesn't actually like going there.
Runtime: 2 minThe sea turtle, Ichikawa, talks briefly about herself and her family.
Runtime: 2 minMarin takes us below the waves to talk about her friends who live there.
Runtime: 2 minKanon explains that sometimes a good shout or fume makes you feel better. We all have stress that builds up.
Runtime: 2 minIt's Suzuki's birthday tomorrow! Are you going, Kanon?
Runtime: 2 minSummer is nearly over, Kanon and Marin both hope you'll visit again soon!
Runtime: 2 minMarin and the girls try to make a boxed lunch for Kojima.
Runtime: 3 minMarin borrows Kanon's school uniform and visits her high school.
Runtime: 3 minMarin and the girls have a pajama party.
Runtime: 3 minOoshima tries to teach the girls how to be maids.
Runtime: 3 minNo overview available.
12 episodes
Two mermaid sisters, Marin and Urin, discover a ring that has fallen in the ocean and attempt to return it to the owner. However, when they find Kanon she refuses to accept the ring and throws it into the forest. Urin gets lost in the forest during a fireworks display and finds a sealed tomb.
Runtime: 24 minWith Sedna's release, darkness washes over the island. Matsumoto, the elder sea turtle, awakens and explains to Marin that she is the Priestess of the Sea. In disbelief, Kanon runs off and is attacked by a creature of darkness.
Runtime: 24 minKanon is shocked to discover that Marin, Urin, and Matsumoto have made themselves at home in her house. Marin poses as a fortuneteller to distract Suzuki from finding Kanon, who is hiding, and learns more about Kanon and her mysterious evil aura.
Runtime: 24 minMatsumoto gives Kanon a treasure map for Kagero Island, hoping that if she finds the treasure it will improve the purity of her heart. After Kanon and Marin leave, Miyako explains to Urin of a legend about a pirate's cursed treasure within the cave.
Runtime: 24 minAmamiko Island is abuzz with activity as tourists flock to see the solar eclipse and Matsumoto fears the darkness such an event could invite. Meanwhile, the growing rift between Urin and Marin reaches a breaking point.
Runtime: 24 minThe solar eclipse blankets the island in night as Marin and Kanon search for Urin. Countless mysterious butterflies and a strange woman appear from the ocean.
Runtime: 24 minIn the wake of Urin's departure Matsumoto's daughter, Ichikawa, is discovered in Kanon's house. A downcast and shaken Marin decides to return to the ocean to search for her sister.
Runtime: 24 minWhile heading back to the surface, Warin explains the nature Marin and Urin's relationship to Kanon. A concerned Kojima searches for Kanon, leading to a confrontation between her and Ooshima.
Runtime: 24 minMarin returns to Amamiko Island in order to regain her ability to transform. Suzuki and Kojima tell Marin about how they met Kanon, and along the way comes to understand her own feelings, as well.
Runtime: 24 min