It is poorly titled,
The Three Boys.
The guys used as there kids are called Buster Boys. I'm not sure what that means or what they are about.
But with some bad editing and imagination, I like to think this is what their kids would look like.
Minochi is the bottom one for despite his age, he will be a short stack.
Akizeto is middle child who will wear shades a lot for reasons explained in book two.
Akimeto is the one on top with the headphones or something stylish on him.