(Cover/links removed thanks to an anonymous whistle-blower/DMCA/Google. Meh, no use arguing with the weather right? Look elsewhere, it's the internet, you'll find it.)
Another frequent request, it's "Binetsu no Mezame" from Yakiyama Line. It's just like "Futari Hanabi," so if you liked that you'll like this.
In case don't know what to expect already, this contains rape and young schoolgirls (I'd call it lolicon if the girls weren't drawn so shapely). Also, the artwork and delivery are both pretty solid.
That being said, enjoy.