Jin - CHALLENGE BOOK BT21 the project highlights the group’s

the project highlights the group’s growing confidence and stage presence while blending upbeat melodies with the high energy performances that have defined their releases so far

This series delivers a thrilling mix of elegance

1 received strong commercial response and helped establish BTS’s global presence

combining luxury brand aesthetics with modern street influenced concepts

Silly Dance

Jin - CHALLENGE BOOK BT21 the project highlights the group’sJin CHALLENGE BOOK is an official interactive merchandise release by Jin of BTS, launched on January 26, 2026 through BIGHIT MUSIC and HYBE as part of the #RUNSEOKJIN_EP. TOUR era. Developed around the playful and energetic atmosphere associated with Jins solo activities and fan engagement style, the project combines collectible merchandise with game inspired activities designed for ARMY participation. The release includes a 32 page photobook