Each of the CD+DVD editions contains a team song unique to that type. The theatre edition will contain a kenkyuusei song. Each DVD will also feature more than 25 minutes of footage from the [2nd AKB48 Kouhaku Taikou Uta Gassen], with Type A containing the compilation from both teams, whilst Type K contains just Akagumi, and Type B just Shirogumi. The music video to [Sugar Rush], the song which featured in the soundtrack to Disney's [Wreck It Ralph] movie.
As usual, the Limited Editions will contain tickets to a national handshake event whilst the first press copies of the Regular Edition will contain a bonus photo. The Theatre Editions are sold alongside individual member handshake tickets and also come with a different type of bonus photo.
Tracklists:
Type A
【DISC1】
1.So long !
2.Waiting room (Undergirls)
3.Ruby （Shinoda Team A）
4.So long ! off vocal ver．
5.Waiting room off vocal ver．
6.Ruby off vocal ver．
【DISC2 DVD】
1.So long ! Music Video
2.Waiting room Music Video
3.Ruby Music Video
4.2nd AKB48 Kouhaku Taikou Uta Gassen ~Compilation~
Type B
【DISC1】
1.So long !
2.Waiting room (Undergirls)
3.Yuuhi Marie （Oshima Team K）
4.So long ! off vocal ver.
5.Waiting room off vocal ver.
6.夕陽マリー off vocal ver.
【DISC2 DVD】
1.So long ! Music Video
2.Waiting room Music Video
3.Yuuhi Marie Music Video
4.2nd AKB48 Kouhaku Taikou Uta Gassen ~Akagumi Digest~
Type C
【DISC1】
1.So long !
2.Waiting room （Undergirls）
3.Sokode Inu no Unchi Fun Jau ka ne？（Umeda Team B）
4.So long ! off vocal ver.
5.Waiting room off vocal ver.
6.そこで犬のうんち踏んじゃうかね？ off vocal ver.
【DISC2 DVD】
1.So long ! Music Video
2.Waiting room Music Video
3.Sokode Inu no Unchi Fun Jau ka ne？ Music Video
4.2nd AKB48 Kouhaku Taikou Uta Gassen ~Shirogumi Digest~
5.Sugar Rush Music Video
Theater Edition
[CD]
01. So Long!
02. Waiting Room (Undergirls)
03. TBA (Kenkyuusei)
04. So Long! (off vocal.)
05. Waiting Room (off vocal.)
06. TBA (off vocal.)
The upcoming single can be heard in the behind the scenes feature of AKB's new Docomo CM.
Melos no Michi, docomo Official