In the near future, amid the colony conflict, a girl was rescued by a young boy as a space station fell to terrorist assault, leaving her parents dead. Years later she enrolled in her grandfather"s military academy. There she encountered a young man who resembled the boy who saved her… but just as she was about to step into the academy grounds, she spotted a "terrorist" lurking nearby—actually a terrorist demonstration staged by the academy"s command, and thus the tale begins… amid the looming threat and chaos echoed.