Also know as Bunny Drop.
This anime was extremely sweet! But the first season is only about 11 episodes!
I'm not sure whether or not there is a second season but i hope there is although i've been hearing that the manga is much better and in the manga she's grown much further than in the anime! which i very much want to see! Mainly about a man whose now caring for a young girl who they think is his aunt (weird right) but i don't think so but i hope to find out soon!!