4 Challenges (single)

4 Challenges is a single that consists of a title track and a coupling track from the unit Photon Maiden.

Their instrumental counterparts are available only for physical albums (limited version included), digital release isn't included. It was released on October 13, 2021.

Tracklist

 * 1) 4 Challenges
 * 2) Hikari
 * 3) 4 Challenges -instrumental-
 * 4) Hikari -instrumental-

Blu-ray Limited Version Bonus

 * 1) Mini Anime D4DJ Petit Mix♪
 * 2) D4DJ D4 FES. -Be Happy- REMIX -Photon Maiden-
 * 3) 4 Challenges MV

Audio
4 Challenges (singiel)