There are many stories with a similar premise. This is my version. Review if you want me to continue.
Kid Stuff
There are many ways to begin a story. Alcohol, Mayuri's decisions, strange creatures with magic.
This story doesn't have a beginning like that.
It started when Matsumoto Rangiku, lieutenant of the tenth division of the Gotei 13 happened to walk onto the mostly empty training grounds of the tenth division. The hard-packed dirt had a layer of frost, emanating from a certain white-haired captain that was sitting on the said ground with a confused expression. His overly-long Zanpakutou was lying next to him, sheathed in its self-creating covering.
She froze. And not because of the temperature.
Her captain, a young man that she greatly respected and cared for and even admired on occasion, had always been short. He was the youngest Shinigami save for the lieutenant of the 11th division, and the youngest Shinigami to have ever made captaincy. He had always been more mature than anyone his age (and sometimes those older than him) and worked hard to not be seen as a child, to be respected for his abilities and not looked down on because of his height or other oddities. It was hard to be treated like an adult when you looked like a 12-year-old.
Except now, sitting on the still frozen ground of the training field, he looked closer to 6 or 7. His confused expression had a distinctly child-like aura to it.
"Tai- taicho?" Matsumoto gaped. "Wha- what happened?"
He looked up, his piercing turquoise eyes gazing at her blankly, as though he didn't recognize her.
She rushed over to him, leaning over to inspect him for any injuries. He looked younger than he did when she first met him back in Rukongai.
"Taicho, what happened to you? You- you're younger!" She helped him stand. He looked a little shaky on his thin legs. His Shinigami uniform was way too big and draped over him, completely covering his limbs, the shoulder sliding off.
He gazed up at Matsumoto, a concerned a slightly worried expression on her face. At his next words, the expression turned to one of anger.
"Who are you, Baa-chan?"
FYI 'baa-chan' is like calling her grandma.
I started two other stories that I want to write but this came to me while I was reading and I wanted to get it down before I forgot. Review if you want me to continue. If not, I just might leave it.