Heart in Blue

 is the fourth single released by Jewel☆Rouge.

Tracklist

 * 1) Heart in Blue
 * 2) One & Only
 * 3) Omoide no Rouge (思い出のルージュ)
 * 4) Heart in Blue (instrumental)
 * 5) One & Only (instrumental)
 * 6) Omoide no Rouge (思い出のルージュ) (instrumental)

Featured Members

 * Sakuma Nodoka
 * Hanamiya Kotori
 * Enomoto Kasumi
 * Mito Ririka
 * Igei Aya