High school girl Xiaozhoshi Haiguo suffers from extreme social phobia and is not good at communicating with others. She feels inferior and troubled by her own personality that she cannot make friends.“ itself cannot be understood on earth.Go to space and find a place to live.”Haiguo harbors such delusions every day, but cannot conceal his uneasy mood. When attending the high school entrance ceremony, he meets a mysterious new student named Ming Neiyou who claims to be an “alien”.The alien he dreamed of suddenly appeared in front of him. While he was surprised, Haiguo also plucked up the courage to talk to him.I heard that Yu seems to have lost his memory and is looking for a way to return to his home planet.Haiguo, who wants to go to space, and Youmu, who wants to go back to space, work together to build a rocket.