The vocal duo of global K-Pop group SEVENTEEN has arrived as a new subunit – DxS (DK X SEUNGKWAN) releasing their 1st Mini Album ‘Serenade’ available in two standard versions: BLUE Ver. & ECHO Ver.

CONTENTS:
- CD
- Folder
- Book Band
- Photo Book (BLUE Ver.: 40pg / ECHO Ver.: 84p)
- Folded Poster
- Sticker
- Credit Book
- Mini Photobook (BLUE Ver. only)
- Bookmark (ECHO Ver. only - 1 of 2)
- Photo Card (2 of 6)
- Lyric Card