BSS - the special sub-unit of SEVENTEEN - is officially releasing their first single album, SECOND WIND. BSS stands for BooSeokSoon and is comprised of three SEVENTEEN members: SEUNGKWAN, DK and HOSHI.

This first release contains a CD

• Outbox
• Photo Book (88 pages)
• Lyric Book (8 pages)
• Photo Card (random 2 of 6)
• Sticker
• Habit Tracker Mini Card (random 1 of 3)
• BSS Mini Card (random 1 of 3)
• Folded Poster.

BSS (SEVENTEEN) / 1ST SINGLE ALBUM 'SECOND WIND'