Summer of 2049. Yuma is a kid who loves everything about space and astronomy. He stumbles across an intelligent being from outer space which talks to him by taking over the body of Nanako, Yuma's home-use AI robot, revealing that it's an extraterrestrial AI on a spacecraft that had malfunctioned when descending to Earth decades ago. It has been dormant ever since, camouflaging itself as the housing complex where Yuma lives! Meanwhile, this is the last summer before their housing complex is demolished. "Will you help me get back into space?" Amazed, Yuma and his friends decide to work together on their final summer project to launch the spacecraft back to space.