Could a strange recurring dream of being part of a team of alien scientists on the moon truly be real? Sensitive Japanese high school student Alice Sakaguchi doesn't really believe that, of course, until, one night, when she dreams the same dream! Now, even her eight-year-old neighbour is acting strange. Is history really doomed to repeat itself, even when that history carries over from a previous life? This is a love story between Alice and her younger neighbour Rin. Six high school students thought they were normal - until all they start having moon dreams. Slowly, they begin to realize these dreams tell of their past lives - a time when a group of seven alien scientists lived on the moon to monitor the earth's development and to do research. As they meet together to discuss the dreams, more about their past is revealed - and more questions arise. Why were they brought back to life on earth? Where is the seventh scientist of their group?