Galaxy Angel EX is a "supplementary" videogame released by BROCCOLI. In the "main storyline," Tact and all of the Angels (including Chitose) are hanging out together on the Elsior and having fun. As the player progresses through the game, the sequence of the main storyline is as follows: The "overriding purpose" of Galaxy Angel EX is to first unlock every difficulty level of every mini-game, and then keep winning points until you've unlocked every single wallpaper from the wallpapers menu.