Gakuen Utopia Manabi Straight! (がくえんゆーとぴあ まなびストレート!, Gakuen Yūtopia Manabi Sutorēto!?, often shortened to Manabi Straight!) is the title of a Japanese manga series set in a fictional future concerning the lives of a group of high school girls. The manga was created by the animation studio Ufotable and illustrated by Japanese artist Tartan Check. The manga was serialized in the Japanese manga magazine Dengeki Daioh, published by MediaWorks, between December 1, 2005 and December 21, 2007. A twelve-episode anime series began broadcasting on TV Tokyo on January 8, 2007, which is complemented by a bonus episode released exclusively on DVD on October 10, 2007. A Playstation 2 visual novel based on the series was released in Japan on March 29, 2007, developed by Marvelous Interactive.

Source: Wikipedia