THE IDOLM@STER MILLION BATTLE OF THE@TER 09 is on sale! From the in-game event "BATTLE OF THEATER" of the game "THE IDOLM@STER MILLION LIVE! Theater Days," "100-ten Number One!" is released! It contains the title track "100-ten Number One!", its off-vocal version, and a drama part available only on the CD! Newly drawn illustration jacket.