Quote from GuttedGnome
Never read it but I've heard that the heroine in Nozoki Ana
is quite slutty.
Edit: I thought I didn't know a shoujo with a slut (that's why I mentioned Nozoki Ana) but apparently the girl in 3D Kanojo
is one, even if I haven't gotten far enough to judge by myself.
Yeap, Both Nozoki Ana and Nozo X Kimi has slutty heroine, but that's Seinen and the main protagonist is the dude anyway
3D kanojo fits the bill but sadly still only 3 chapters