Not many games to be found on /cm/ lately, thought I'd try one myself. Simple really, post a page from a Doujinshi and the next person tries to guess it. They post a page from a Doujin of their own and the cycle continues! I'll start with something I think is pretty easy....
>>1174624MelloxNera by Riset.IC
It would make more sense and be alot eaither if people posted the pairing too, you know how many doujinshi are out there!?