New PSP visual game "Tantei Opera Milky Holmes 2" developed and published by BushiRoad is scheduled to be released on August 23 in Japan. The opening movie for the game was posted on YouTube and Nico Nico Douga yesterday, on June 14. The theme song "Prologue wa Ashita Iro (the prologue is the color of tomorrow)" is of course performed by the voice actress unit "Milky Holmes" (Suzuko Mimori, Sora Tokui, Mikoi Sasaki, Izumi Kitta). The CD single of the song will be released on the same day in Japan.
Source: New Akiba.com