Junior high student Tetsu is alone in a classroom when a small flying saucer crashes into the room. The pilot is a cute human-looking alien girl named Lan. She's searching for some alien life forms that have escaped from her planet and are now on Earth. Lan enrolls into the school and joins Tetsu as the only other member of the soon-to-be-defunct biology club, hoping that together, they can somehow round up the truant creatures. But Tetsu has a deadline to meet - he must recruit at least three more members in three months, or the biology club will be history.
