Theres an IB transformation in a sidestory of Ran to Haiiro no Sekai (vol3).
I'm not exactly shure what happens, since you can see the the woman in the first and last page. So if anyone can read/translate this, please tell me whats going on there.
Also, i resized the pages, you can download the complete volume here
http://raw1st.com/ran-to-haiiro-no-sekai/