Responses

I still don't think he is 12 but even if he is you people need to consider what era this story is happening in and not try to force your modern rules or mindset or morality over it. Is it wrong for him to be in a sexual or romantic relationship this early? Yes. Was this considered a norm? Yes again so if the story's theme dosen't suit your taste stop reading it. Go read some easier things that dosen't need you to actually think and consider things before reading.
I don't understand why people are bothered about sage looking younger than he actually is