订阅以下载
THE IDOLM@STER Opening Intro&Background（25話劇中歌「私たちはずっと…でしょう？」）

UPDATE:

How to use:

1 download bik file here.
link：pan。baidu。com/s/1KtToe6csj--bJPZlRxroTg （change "。"to“.”）
password：l4d2


2 go there"steam\SteamApps\common\Left 4 Dead 2\left4dead2\media" (you can make a copy of the original file)

3 make 6 copies 'idol m@ster.bik" then change the name of them "l4d2_background01""l4d2_background02""l4d2_background03""l4d2_background04""l4d2_background05""l4d2_intro"

4 copy them to"steam\SteamApps\common\Left 4 Dead 2\left4dead2\media"and overwrite.


that's all.

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for better experience ,suggest you to subscribe this
http://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=298797334
it's made by Nate Almighty94 .An amazing addons.(°∀°)ﾉ

アイドルマスター
THE IDOLM@STER
25話劇中歌「私たちはずっと…でしょう？」

If you cann't download the "idol m@ater.bik",tell me please.
enjoy,OwO.