Contents
- Version : BLUE ver. / ECHO ver.
- Photobook : 220x170x8 (mm) / 40p each side / 170x220x12 (mm) / 84p
- Folder : 170x220x4 (mm)
- Folded Poster : 300×120 (mm)
- CD-R : Ø 120 (mm)
- Mini Photobook : 130×180 (mm) / 8p
- Bookmark : 60×70 (mm) / Random 1ea of 2
- Sticker : 120×120 (mm) / 2 Versions
- Lyrics QR Card : 55×85 (mm)
- Credit Sheet : 130×180 (mm) / 4p
- Photocard : 55×85 (mm) / Random 2ea of 6

Track List
1. Rockstar (DK Solo)
2. Blue
3. Guilty Pleasure
4. Silence
5. Dream Serenade (SEUNGKWAN Solo)
6. Prelude of love