Name of an anime that once played on Starz?

I can not remember the name of this anime, and it's driving me crazy!! It played on Starz a while ago, all I can remember was that it was about some high school boy and there was a whole group of girls. And he had a big crush on the shy girl with big...*ahem* . And the girls where in a special group or something, and for some reason he got aloud in. I am guessing the anime is rated Mature cause their was quite a bit of ual stuff (no or anything, Just a lot of and falling onto of some girl) If anyone has any idea what this anime is please tell me!!