The president of the "Astronomy Club"—a club dedicated to searching for aliens—Di Qiuren leads his members in tracking down extraterrestrials everywhere, yet they have never succeeded. However, what Qiuren doesn’t know is that the goofy members around him are actually aliens in disguise. On one side is an alien-obsessed stalker who never gives up; on the other are aliens disguised as Astronomy Club members, lurking around Di Qiuren for unknown reasons! To keep their identities hidden, the aliens work hard to learn and understand human behavior, kicking off a hilarious school life with Di Qiuren.