So I have this headcanon…
Sixteen year old, Neji and Sasuke are working on a school project together and Neji gets put on babysitting duty for his six year old cousin, Hinata. Hinata is always claiming that she loves the Uchiha. Sasuke isn’t bothered by it because she is, in fact, a child.
Sasuke glanced down at the navy haired girl. She was quiet and seemingly smart. “No,” he answered Neji. “I haven’t, have you?”
Neji shrugged and brushed chocolate locks behind his ear and opened his folder. “You can look through these. I’m sure you’ll find one-”
“Nii,” Hinata whispered and tugged on his pants leg. “What color is this kitty?” She held up her coloring book.
“Hinata, please, we have to focus.”
Sasuke looked away from her saddened face. Onyx eyes rolled over the list of titles. He wasn’t reading or rather he couldn’t. The child was staring at her crayons as if it was so hard to color a cat. He groaned. “Look, kid.”
Hinata squeaked and brought her attention to the Uchiha. “Y-yes?”
“Color it whatever you want.”
Sasuke narrowed his eyes at her lacking vocabulary and had to remember that she is indeed a child. With a sigh, he nodded. “Sure.”
She then picked up seven different blue crayons. “All the bloos!”
“If you want.”
She giggled, showing off a single dimple. “M’kay!”
Neji isn’t happy that a single act of kindness from “an older male” has his cousin so goofy. Sasuke likes to piss Neji off by doing extra nice things for the little girl. The very week she starts school, Hinata begs Neji to take her to see Sasuke. Once there:
"I sorry, Sasu," she pokes her fingers. "We have to b-break up."
"Excuse me?" Sasuke humored her.
She climbed in his lap then cupped his face. “I met…” Her cheeks glowed at just the thought of the new blond boy in her class. “I met someone new.”
"Kind of thought we had something special?"
She giggled. “Silly Sasu. We like different bloos.”
Author Note: I don’t know, I just was feeling a platonic fluffy SasuHina. Of course, almost 13-14 years later Sasuke still reminds her of that moment.