I have been on vacation, onigafuchi has been dead lately, the owner been too busy and did not give me permissions to update the site in her stead. I have recently completely my higurashi collection of all manga and comics. Working on cds and dvds now. I have handful of akasaka and rika but no keixRika. I do not collect hentai so maybe the reason have yet to see one is because of that maybe? Well check otakurepbublic which keeps a good list of doujinshi, if see a candidate I will send my friend in japan to get it for far cheaper.
Link
This is some of my rika ones but alas no kei
When I get time I check my manga for some KeixRika, but most of the stuff is just playful antics nothing serious.