Umi Monogatari: Anata ga Ite Kureta Koto (Sea Story) is a "magical maiden fantasy" anime spinoff based on some pachinko games (allegedly Japan's most popular), coming from studio ZEXCS and Aria director Junichi Sato. The "transforming magical girl action" 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. (ANN description) Two "pure" sisters? Approved! The anime began airing on June 25, 2009.