I think you just need to change your perspective on reading their story, the top just chose to portray to be a human child coz thats what he first saw upon his venture when he was just created and he just assumed that form. He can actually change whatever form he wants as what the other dragon said (other dragon portrayed as a deer). But it's true though that the bottom practically raised the top for 10 years hehe
The thing is, he was never the issue. The issue is the human in this category. It was never him. He’s technically an immortal being that doesn’t need age because after he understands something, it doesn’t really matter what age he was he could always just grasp it but my issue is the human equivalent like the human person in this the adult. It’s just weird. I felt like it wasn’t necessary to be specific done better. I also feel like the sort of the end kind of sucked.

mannneee this would’ve been top tier if it wasn’t a dad x son trope like who in they right mind marrying the little kid they raised