Okay, I'm not even sure if this manga is on Dynasty Scans, but I figure you guys are my best shot at finding it.
I read this one a really, really long time ago on /u/. It was posted in an incest thread but I'm not sure if it was actually incest because I don't think it was translated at the time. Two girls are on a bed. One of them is playing a game while the other sexually harasses her from behind. They fuck. Then they make out and fuck again. Not the best description, I know, but I have gone mad trying to find it again.