While I like the general plot and story, I can't help but nitpick how adult-like and stoic Takumi acts. Gou actually feels much more like a kid his age. That said, Takumi isn't perfectly mature. He still has this childish arrogance in him, but his overall personality is simply too mature for someone his age, at least for my liking. Watching Takumi feels more like watching an adult than a 12-year-old child.