This drama is adapted from the manga of the same name. It tells the story of Takasugi Atsumi, who is single, has no girlfriend, and struggles to make a living by studying geography. One day, he suddenly becomes the underage guardian of his relative Kururi, a middle school student whose parents have both passed away. He is confused about the unexpected life together, while clumsily trying to make bento. Through the "taste of family", the two of them slowly grow up.