Male: Izayoi Sakamaki (Mondaiji-tachi ga Isekai kara Kuru Sou Desu yo?)
http://th09.deviantart.net/fs71/200H/i/2013/016/d/0/sakamaki_izayoi__3_by_echizen_momoko-d5rozct.png (Unsupported image host)

Female: Mashiro Shiina (Sakurasou no Pet na Konojo)
http://www.emptyblue.it/data/wallpaper/sakurasounopetnakanojo/Shiina_Mashiro_321_thumb.jpg (Unsupported image host)