is a Japanese media franchise created by Ouji Hiroi, and is developed and licensed by Red Entertainment and Sega (who also owns the franchise). The franchise centers on a series of dramatic fantasy and science-fantasy tactical role-playing adventure video games, which consist of tactical wargame and dating sim elements, but includes a motion picture, anime, printed media, and other merchandise. The series began in 1996 as an eponymous video game; the game was a success and spawned sequels. The video game series has since branched into other genres and platforms, such as portable games and games for mobile phones.