E1 - Heart of the Sea, Heart of the Sky
!Jun 25, 2009 - 24m
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.
E2 - Heart Of The Ring, Heart Of The Priestess
!Jul 2, 2009 - 24m
With 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.
E3 - Hearts Getting Closer
!Jul 9, 2009 - 24m
Kanon 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.
E4 - Heart Under Trial
!Jul 16, 2009 - 24m
Matsumoto 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.
E5 - Heart which Conceals the Light
!Jul 23, 2009 - 24m
Amamiko 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.
E6 - Hearts Falling
!Jul 30, 2009 - 24m
The 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.
E7 - Hearts Growing Apart
!Aug 6, 2009 - 24m
In 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.
E8 - Hearts Seeking Each Other
!Aug 13, 2009 - 24m
While 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.
E9 - Loving Hearts
!Aug 27, 2009 - 24m
Marin 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.
E11 - Heart of Light, Heart of Darkness
!Sep 10, 2009 - 24m
No overview available.
E12 - Heart of the Island, Hearts of the People
!Sep 17, 2009 - 24m
No overview available.
