Specials
Episodes
1 Farewell, Kokoro-chan. Long Goodbye Forever and Ever... Aug 25, 2011 
2 Alternative One: Opera Kobayashi and the Five Paintings Aug 25, 2012 
3 Alternative Two: Opera Kobayashi and the Raven of the Empty Sky Jan 3, 2013 4 Milky Holmes: Fun Fun Pearly Night ~The Gift of Ken and Janet~ Dec 30, 2016 5 Milky Holmes: Arsene Karei naru Yokubou Dec 30, 2017 6 Detective Opera Milky Holmes: Psycho no Aisatsu Dec 30, 2018