Official BTS WINGS Concept Photobook BTS unveils the secrets behind the Wings album in the BTS Wings Concept Book! The 312-page photobook shows the production process of the album's short films and music videos, as well as photos were taken during various promotional activities including The Wings Tour. Interviews with the members are also included. ©︎ Bighit Entertainment 2017.06.29

Idea for the BTS theory's concept