This is the soundtrack for Letters From a Rainy Day -Oceans and Lace-. It contains a total of 13 tracks, including the vocal version of the opening theme song, plus short and instrumental versions.

【Theme Song】

Opening Theme "Uncertain Rain"
Vocals: Hotaru Murasaki
Composition & Arrangement: Tomohiro Horihata (etonenote)
Lyrics: Junpei Shiozaki (etonenote)

【BGM】

Tomohiro Horihata (etonenote)
Namiko Hatakeyama (etonenote)
Shigeru Ikezawa(etonenote)
Yoshihiro Hara(etonenote)