THE IDOLM@STER MILLION BATTLE OF THE@TER 10 goes on sale! "INVISIBLE LIGHT" from the in-game event "BATTLE OF THEATER" in the game "THE iDOLM@STER MILLION LIVE! THEATER DAYS" is released! It contains the title song "INVISIBLE LIGHT" and its Off Vocal version, plus a drama part that can be heard only on the CD! Newly drawn illustration jacket.