It's hard to say for sure. If the author or creator has stated that it's based on real-life, then it might be. But often, stories like these can be a blend of reality and imagination to make it more engaging.
I'm not sure specifically as I haven't read it. But it might be about a group of boys who are in a situation where they need to be cheered up or they themselves are the ones doing the cheering in some kind of story.