That was when Maimi tried real kickboxing 5 years ago, as in training and risk getting hurt. it wasn't just some pose in UTB magazine. http://gree.jp/c_ute/blog/entry/511808844
Eripon could risk injuring herself in a photobook shoot, which is silly.
Eripon would probably do a typical cute photobook like her first DVD (which is the same as a photobook)