Quick answer — World War Blue: the opening theme is "retrospective world" and the ending theme is "0 to 1 no Hana".
Segua Kingdom has been losing the war against Ninterdo Empire but the tables are turned by the appearance of a boy called Gear. All the characters are parodies of Nintendo or Sega games such as Sonic the Hedgehog, Super Mario Bros., The Legend of Zelda etc. Produced by DAX Production, this action, adventure, and ecchi series premiered in Fall 2012. With 3 episodes total, it is finished.
World War Blue has 3 episodes and is finished.
World War Blue was produced by DAX Production and released in 2012.
World War Blue is classified under Action, Adventure, Ecchi, Fantasy.
World War Blue premiered in Fall 2012.
The opening theme of World War Blue is "retrospective world".
The ending theme of World War Blue is "0 to 1 no Hana".
World War Blue is based on a manga.
World War Blue is listed on Crunchyroll, Hoopla. Availability varies by region.
Character data from AniList.
