I thought it was extremely humourous to have the male abnormally short and the female abnormally tall. A great twist to normal shoujo stories.
And the fact that this wasn't some usual love triangle, or girl-loves-popular-boy-but-she's-worth-nothing kinda story really made it worthwhile.
You can see already that Risa, the main character, is quite amusing. And with Otani, the other main character, they're both.. amusingly amusing together~ :D
Yeahh. I can't say much without spoiling the greatness of this anime series. Basically, watch it. It'll keep you hooked on with the dramatic moments and the hilarious laughs you'll get out of it, and even a couple of major SURPRISING moments that'll make you gasp for air. :]