Jin 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 Jin’s 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 alongside themed items such as a crayon set, sticker set, mission roulette and exclusive photocard packaged in a large collectible outbox format. The concept of the CHALLENGE BOOK centers around interactive missions and entertainment inspired by Jin’s humor, creativity and connection with fans. Featuring activities tied to concert memories, games and participation challenges, the merchandise blends playful design elements with colorful visuals and photobook content that reflect Jin’s lighthearted personality and performance identity during the RUNSEOKJIN era. The inclusion of physical mission tools and themed collectibles gives the product a unique format compared to traditional K pop photobooks and merchandise releases. CHALLENGE BOOK generated enthusiastic reactions from ARMY following its announcement, with fans praising the originality of the concept and the personalized approach to fan interaction. The release quickly became a highly discussed merchandise item within BTS fan communities due to its creative packaging and activity based format, further strengthening Jin’s reputation for developing engaging and memorable fan focused content outside of standard album promotions. INCLUSIONS: - Outbox- Photobook : 32p- Crayon Set : 2ea- Sticker Set : 2ea- Mission Roulette : 1ea- Photocard : 1ea