A fourth-grader, Aoyama-kun, investigates the mysterious reason behind the sudden appearance of penguins in his village, which is somehow related to a power from a young woman working at a dental clinic.
This film was inspired by a real-life story of a Japanese father who for the three years his daughter spent at high school prepared daily bento lunch boxes for her leading to delicious, interesting or offbeat creations. In all cases, he put an effort into equipping his daughter with sustenance for school.