Aoyama is an intelligent and inquisitive fourth-grader who enjoys exploring the world around him. He has a lot of potential and will soon become an adult. For now, he must live life as a child. Summer has arrived, and school is almost over. Aoyama has a crush on an older woman he met at his dentist's office, who is coaching him in chess. Additionally, a colony of penguins has appeared in their small town. The source of these waddling visitors remains unknown. Aoyama and his friends embark on a research mission to investigate the mysterious penguins using scientific methods and principles. Their findings only lead them to more puzzling questions.
Winner of the Excellence Award on the 22nd Japan Media Arts Festival.