H2O: Footprints in the Sand is a Japanese adult visual novel by Makura which was released on June 23, 2006 for the PC as a DVD; a version playable on the PlayStation 2 under the title H2O + followed on April 24, 2008 with adult content removed, but in its place will be additional scenarios and graphics not seen in the original release. H2O is Makura's first game; a sequel named Root After and Another was later produced in October 2007. The gameplay in H2O follows a plot line which offers pre-determined scenarios with courses of interaction, and focuses on the appeal of the three female main characters. There are two modes of gameplay, the Blindness Effect and Normal Effect, where the former plays on the fact that the protagonist is blind, and the latter mode removes the added element of gameplay the Blindness Effect has. The story is broken into three parts: the original introduction and meeting, following by a separation and reunion, and finally ending with the protagonist choosing one of the girls and spending the rest of the game with her.

Anime: Takuma Hirose, a blind young male high school student, though the cause for his blindness is undetermined. After his mother died an unexpected death, it left a deep emotional scar on him, which caused him to become very lonely and reserved. Due to this, Takuma move from the city out into a rural area and Takuma is enrolled into a new high school. At his new school, he meets several new girls, though three of whom he gets to know the most out of anyone else. They are, the firm and obstinate Hayami Kohinata, the kind and obliging Hinata Kagura, and the cheerful and mysterious Otoha. As Takuma interacts with these girls, his medical condition gradually begins to heal.

(source: Wikipedia, ANN)