A is for Acceptance
As a small child, all he strived for was acceptance. He wanted it in any way that it came. As a small child, he was far from gaining it, though he didn't know why. From Mizuki, he then learned why. It was first from Iruka that acceptance had come. He learned what it felt like, and from there, easily recognized the rest.
From Sasuke, he gained acceptance as a brother; from Kakashi, as a student. From the people, he would gain acceptance over time. But from Sakura, acceptance in the form of a sincere smile was all he'd ever need.
I'm nervous as to how this will turn out. Feedback is nice.