In the year 20XX, humanity encountered an unknown lifeform. It attacked us, trying to invade Earth. The world’s military forces combined into the United World Army to try and stop these invaders. The United World Army started work on developing “battle robots” to fight in space; high-performance battle robots that were needed to ensure the survival of the human race. But the UWA was not enough: interception teams have also been required from private companies.
This is Neo Front Osaka’s battle robot development industrial park. It is also home to SUNFLAG, a company developing some of Earth’s best battle robots.

We successfully developed the SF-001-SK Unidentified Lifeform Interceptor Attack-Class Battle Robot. This battle robot is the hope of all humanity.