I've been interested in the unwilling loli sort of theme. Not outright rape, but definitely not consensual, though I suppose rape could happen later. Something like a pervert on the bus or an older relative in the bath. It could also be an unsuspecting loli, like sitting on a guy's lap not realising that he's rubbing against her. I'm not interested in lolis who are happy with the situation, especially when they say something feels good when it really ought to be painful. >.>

Male on female preferred, though I suppose an exceptionally awesome same sex (yaoi or yuri) manga would be fine.

bump - Nobody can think of one?