From the introduction: Welcome back to Earth, Jumper, Holy Terra, etc. This story you are about to embark upon takes place in a time when mankind has begun to expand our species beyond the limits of our planet. All prior space-programs have joined together under the banner of the ISDA (International Solarsystem Development Agency) based in New Ogasawara, Japan. They presently also have a base, alongside a thriving colony, on the moon.