Concepts

The concept for the BU was at first a guesswork of ARMY, the fandom of BTS with no name to categorize the series of films released relating to the webtoon but it was later revealed by the company Big Hit that it was called BU. The logo first appeared on the back of "BTS WINGS CONCEPT BOOK," a group of goodies covering concepts, planning, and interviews of the WINGS series. Then it reappears in The Most Beautiful Moment in Life "THE NOTES". The descriptions of music videos such as Blood, Sweats, and Tears and WINGS SHORT FILMS can also be found with the logo "BU content certified by Big Hit Entertainment." which most likely that videos and albums with the said logo and words are the only contents related to BTS' storytelling.

It is assumed that the acronym BU stands for BTS Universe or Bangtan Universe, but there was no official statement about it's meaning. Many have assumed that the BU logo/description attached is related to story/setting. The main contents related to the BU are as follows: Videos have been credited in Big Hit Entertainment YouTube Channel, BTS JAPAN OFFICIAL YouTube Channel, UNIVERSAL MUSIC JAPAN's YouTube channel.