I´m looking for an anime with the follow attributes. I saw this anime some times ago, but totaly forget the name .
The girl: very large, thin, often cries, go to high school
The boy: very small, thin, go to high school
The two are like water and fire at the beginning, but with time, they are beginning to like.
The typical style of this anime is the size difference of the main characters.
I need your HELP to find refind this anime
PS: Sry for my bad English.....my strenght is the "Read and Understand" part, but not the "Write an Speak" part