Natsu no Yakusoku

 (夏の約束) is the 15th single by Horie Yui.It was released on July 25, 2012, and peaked at #12 on the Oricon single chart.

Single Information
The lead track Natsu no Yakusoku was used as the ending theme for the anime Dog Days'.
 * Catalog Number:
 * KICM-1402 (Regular Edition)
 * KICM-91402 (Regular Edition)
 * All Lyrics: Kawada Ruka
 * Composition: Miyazaki Makoto (Track 1), Kawada Ruka (Track 2)
 * Arrangement: Miyazaki Makoto (Track 1), Kawada Ruka (Track 2)

CD

 * 1) Natsu no Yakusoku (夏の約束)
 * 2) Harenohi Gensoukyoku (ハレノヒ幻想曲)
 * 3) Natsu no Yakusoku (off vocal ver.)
 * 4) Harenohi Gensoukyoku (off vocal ver.)

Limited Edition DVD

 * 1) Natsu no Yakusoku (MUSIC CLIP)