TAKAGI Ryo: 高城リョウ Also writes under the pen-name of Hazuki Ryouka. Ryo Takagi, a much-loved author in the yaoi genre, is most known for her series Kirepapa, which was developed into a drama CD and in 2008, an OVA. She made her debut with a comic called Okome-chan. The Devil Within is her first manga to be published in the U.S.