Sorelle Rosa was the exclusively Buono! cover group. It is now defunct, but has been replaced with Carino!.
The idea for it was originally conceived by Michi in October of 2013, but not until January of 2014 was it ever put into action.
Comprised solely of Sayuri, Natsumi and Michi herself, these three cover only songs from the Hello! Project unit Buono!
Their name means "Pink Sisters" in Italian because all three of their member colors are varying shades of pink.
On July 29, 2014, the group released their last single due to the graduations of Sayuri and Natsumi.