As previously mentioned, T.M Revolution and Mizuki Nana would be teaming up for the 2nd season Valvrave OP theme song, and details has been announced for the new single.
The new song is titled “Kakumei Dualism (革命デュアリズム)”, and the single would be released on 23 Oct 2013. There would be three different version of the CD single. The limited edition (CD+DVD) contains both the regular version and anime version of the song, along with the music video. The time-limited edition would consist of only the regular version, while the regular edition would contain three separate versions (regular, T.M.R only, and Mizuku Nana only).
Its gonna be a tough choice on which edition of the single to get, but its clear that they are aiming right for the No.1 spot on Oricon when it is released in October.
Source: music natalie