As people have been saying, the next story appears to be Shinonome/Yukimura.
http://fuufou.tumblr.com/post/124316063312/more-news-from-hanaoto-web-site-its
I believe sensei's going to put all pairs in one volume? ----> http://fuufou.tumblr.com/post/123824651777/sakuraga-sensei-has-updated-her-blog



Enjoy :)
http://ichinkoscans.tumblr.com/post/125771188252/caste-heaven
Thank you (and the translators) so much! So Kuze did want to see people from the top and bottom switching places--but he is not as close to Karino as I had thought. Interesting.