In this book, Otoshi discusses, with children, the issue of bullying, what they can do to end bullying at school and how they can help someone who is being bullied.
In “One” the author uses colors and numbers to explain the issue of bullying. In this story, several colors feel sad because they are being bullied by Red which likes to tease all the other colors. Consequently, the colors are afraid of Red. This makes Red feel meaner and stronger. Red grows bigger and bigger which made the rest of the colors feel more scared of him. But, one day number “1” comes along and shows the colors how to stand up to Red. By standing up to Red, the colors become numbers 2, 3, 4, 5, and 6. Seeing this, Red got more upset, but when he tries bullying the numbers again, they stand up to him. Lastly, the numbers’ actions teach Red that being a bully is not nice. Red learns about the importance of being nice and respectful, which makes him to be part of the group and change into the number 7.