Gal Gun 2 is an RPG about your life at Sakurazaki Academy, Sakurazaki Academy is hard to get into, one day, there was a strange app installed on your phone, it can't be uninstalled, all you could was open the app, a magical box would appear on your desk at the school, it had magical Goggles and a Demon Sweeper, you had to put the Goggles on, a Angel named Risu would appear and let you know you were the chosen 'Hero',  Demons were invading the Academy, you had the power to stop the Demons.