Wadanohara and the Great Blue Sea  Wadanohara and the Great Blue Sea () is a 2013 fantasy, and role-playing video game developed by Deep-Sea Prisoner using the RPG Maker 2000 program. The game was adapted into a manga in 2015. Wadanohara and the Great Blue Sea is a fantasy RPG where the player uses the keyboard to control the characters. The game world is kept largely linear, but occasionally changes into an open world. The combat system is turn based and the characters can become stronger through winning battles. It is possible to equip characters with armor and weapons to increase combat power. As in many RPG Maker games, the playable characters are able to use magic. The game was programmed using RPG Maker 2000 for Windows systems, but is also playable on macOS and Linux . The young witch Wadanohara returns to the Blue Sea after a trip, and is greeted by the residents there. The Totsusa Kingdom, however, is sending their soldiers over in attempt of invasion. The employees of the Blue Sea's court state that they would like to avoid invasion as much as possible. Wadanohara is sent with her familiars to fix the six blue orbs that connect into a barrier protecting the Blue Sea. Every time Wadanohara fixes a orb, she states that something feels odd, strange, or anything of the like. After fixing every orb, the Blue Sea has a banquet in celebration of it. During the banquet, Wadanohara goes to the surface, and then encounters Laurentia, a demon employed by the Totsusa Kingdom. She breaks all the orbs, destroying the barrier, and allowing the Totsusa Kingdom to invade. After making it through the invading Totsusa Soldiers, Wadanohara and her familiars manage to make it to the throne room just as Totsusahime is cornering Uomihime. From there, the two girls are quick to make up, the whole issue being something Uomihime did not even do. It is implied that there is something afoot here. The second part of the game goes into this, showing a much darker enemy coming to rise against the Blue Sea. There are numerous endings, and the player is forced to view most of them to reach the True Ending. In August of 2015, the developer of the game, Kaitei Shujin, also known as Deep-Sea Prisoner, released an adaptation as a manga online via Gene Pixiv, before being later published as a paperback by Kadokawa Shoten.