I just recently get to know Bleach and I read from a great bleach site that 'Hitsugaya and Hinamori Momo, Vice Captain of 5th Squad, have a history together, as seen in Episode 46 where Hinamori endearingly refers to him as Whitey-chan. At that moment in time as Hinamori was working to become a shinigami, Hitsugaya thought nothing of it because all he wanted was to eat watermelon and for Hinamori to stop calling him Whitey-chan. She told him that if he could be at the same level as she was then she would stop calling him Whitey-chan.'

I was just wondering is this information true beacuse I have only read until the manga chapter 182 and the soul soicety arc is like over. Does anyone know which manga chapter is it that mentions this part about shiro-chan and momo's past?

Thanks for taking your time and sorry for my lack of knowledge

actually there was only a small part of a chapter where we see Momo running off to shinigami school while Hitsu was eating watermelons.
forgotten which chapter but i aint gonna spoil, just to say they are childhood friends.