Natsu no Hi to Kimi no Koe

 is the ninth single released by ChouCho. The lead track was used as the opening theme for the anime Glasslip, while the B-side was used as an insert song.

Single Information

 * All Lyrics: ChouCho
 * Composition: Watanabe Takuya (Track 1), Yatoki Tsukasa (Track 2)
 * Arrangement: Watanabe Takuya (Track 1), Yatoki Tsukasa (Track 2)
 * Strings Arrangement: Ishikawa Tomohisa (Track 2)

Tracklist

 * 1) Natsu no Hi to Kimi no Koe (夏の日と君の声)
 * 2) Lucent Eyes (ルーセントアイズ)
 * 3) Natsu no Hi to Kimi no Koe (夏の日と君の声) (off vocal)
 * 4) Lucent Eyes (ルーセントアイズ) (off vocal)