Contrary to popular belief, the hardest part about becoming an astronaut isn't being shot into orbit while sitting on top of the world's largest fireworks display. Nor is it coming back home in a fiery reentry into Earth's atmosphere. No, those events, while momentous, are easy compared to all the studying and training required to actually get to those points. And the hardest part of all is the waiting: waiting to see if the technology for a mission will be ready in time. Waiting to see who gets selected for each crew. Waiting to see if the weather is clear for each launch. And waiting to see if everyone makes it back home alive. That's a lesson that Mutta is now painfully learning twice over, as he waits to find out the result of his JAXA exams and watches while his younger brother, Hibito, prepares for his own historic journey to the moon. Will Mutta finally pass and move on to the next stage of his own training? And will Hibito's mission end in success or tragedy? The tension mounts as the countdown begins in the third spectacular collection of SPACE BROTHERS!