Sorairo Days

 (空色デイズ) is the third single by Nakagawa Shoko. It, and peaked at #3 on the Oricon single chart.

Single Information
The tracks Sorairo Days and happily ever after were used as the opening and second ending theme for the anime Gurren Lagann.
 * Catalog Number:
 * SRCL-6572 (Regular Edition)
 * SRCL-6570/1 (Limited Edition)
 * SRCL-6573 (Gurren Lagann Edition)
 * All lyrics: meg rock
 * Composition: Saito Shinya (Track 1), Kurosu Katsuhiko (Track 2)
 * Arrangement: Saito Shinya (Track 1), Kurosu Katsuhiko (Track 2)

CD

 * 1) Sorairo Days (空色デイズ)
 * 2) happily ever after
 * 3) Mitsubichi no Sasayaki (みつばちのささやき)
 * 4) Sorairo Days -Instrumental-

Gurren Lagann Edition CD

 * 1) SSorairo Days
 * 2) happily ever after
 * 3) Sorairo Days -(of construction) TV Size-
 * 4) Sorairo Days -(of realization) TV Size-

Limited Edition DVD

 * 1) Sorairo Days -Music Clip-
 * 2) Sorairo Days -Special Edition-

Covers

 * Endoh Masaaki - ENSON2 (Track 3)
 * Tomita Maho - Kamikyoku Utattemita (Track 6)
 * Ritsuko Akizuki (CV:Naomi Wakabayashi) - THE IDOLM@STER MASTER ARTIST 2 -SECOND SEASON- 04 Akizuki Ritsuko (Track 5)
 * I☆Ris - Cover☆Ris (Track 2)
 * EMERGENCY - ADM - Anime Dance Music produced by tkrism - (Track 11)
 * Sakakibara Yui - LOVE×CoverSongs (Track 3)
 * Poppin'Party - Sorairo Days