Ocean of the Heart

The song "Ocean of the Heart" is in the original key of G major. This song is featured in the game Wadanohara and the Great Blue Sea, which was released on June 26, 2013, developed by Deep-Sea Prisoner. Yurin performed the vocals for this song, while Chamoo composed the music. The song serves as the opening theme for the game and has become a popular track among fans. A notable trivia about "Ocean of the Heart" is that it has been covered by various artists within the game's fan community. The melody of the song is soothing and captures the peacefulness of the deep sea, creating a sense of tranquility and serenity.