we do not know if hes that boy on the left, it's not stated in the manga. The picture wasn't even shown in the manga, it was sketched out by kishimoto and used it as a page divider in a manga (japanese). I've seen it before when i was reading it. It hasn't been shown in the story.

Edit: Remember we saw a picture of Naruto with frog, sasuke with snake, sakura with snail. But it's not necessary true, because why would kishimoto forshadow us like that... he might just be drawing it for the fun of it.