Introducing our feature OCs Chihaya Natori and Aya Isuzu - Chihaya is a cute (but a bit introvert) sixteen year-old from the city who visits Miyako Island for vacation. Her first stay there was in the past summer when her parents were starting to work out a s divorce (they are ok now). Aya, agile and joyful, is Chihaya's younger counsin who has never left the Island. Being a lover of the sea, she first introduces Chihaya to the fun of open water diving (or to some extreme forms of it :-)). And - there is a newcomer half-American priestess girl Saki Elizabeth Walters - whose story is yet to be told.