HKT48 and Nogizaka46 held a "East vs West" idol battle with each other on LOTTE GUM event "GUM ROCK FES. In Nippon Budokan" at 25 January 2016. LOTTE GUM has upload full version video (HKT48) on their official Youtube channel at 5 February 2015.
NEW! GUM ROCK FES. / HKT48 Video (full ver.)
GUM ROCK FES. Digest special video
GUM ROCK FES. video by JIJI Press