U / Back Again

"U / Back Again"
Artist	KNK
Released	October 11, 2017
Format(s)	CD, DVD, download
Recorded	2017
Genre	Pop
Length	7:11 (Regular) 14:22 (Limited A) 14:20 (Limited B)
Label(s)	Universal Music Japan
Release chronology
Previous	Gravity, Completed
Next	"Closer"

"U / Back Again" is the first Japanese single by KNK. It was released on October 11, 2017.

The physical release comes in three versions: a regular CD edition and two limited CD+DVD editions (A and B).

Track list

1. "U (Japanese Version)" - 3:39
2. "Back Again (Japanese Version)" - 3:32

CD (Limited Edition A)

1. "U (Japanese Version)" - 3:39
2. "Back Again (Japanese Version)" - 3:32
3. "U (Instrumental)" - 3:39
4. "Back Again (Instrumental)" - 3:32

CD (Limited Edition A)

1. "U (Japanese Version)" - 3:39
2. "Back Again (Japanese Version)" - 3:32
3. "U (Korean Version) (2017 Remastered)" - 3:39
4. "Back Again (Korean Version) (2017 Remastered)" - 3:30

DVD (Limited Edition A)

1. "U (Japanese Version)" performance video
2. "Back Again (Korean Version)" music video

Video links

• "U" performance video
  • Teaser