The Fandom Post is reporting that Tubi TV has added all 13 episodes of the Umi Monogatari anime to its service. The episodes are available to users in the United States and Canada with Japanese audio and English subtitles.
The story of the series is described as:
Marin and her sister Urin live in the sea. One day they find a ring fallen into the sea. They get out of the sea and meet a girl Kanon, the owner of the ring. Kanon tells them she doesn’t want the ring anymore because it was given by her boyfriend whom she just broke up with, and she throws it into the forest. Marin thinks Kanon is still in love with him and looks for the ring with her sister. But Urin accidentally breaks a seal near a shrine…
Umi Monogatari was directed by Junichi Sato, and it aired on Japanese television in the summer of 2009.
Source: The Fandom Post