Stella Quintet (ステラ・クインテット Sutera Kuintetto) is a group formed from the five main male characters in Kin’iro no Corda ~primo passo~. Moreover, the group sang the ending theme for the series, titled Crescendo, and is their debut single. As of July 2008, the group has released 2 singles. With the appearance of new character Aoi Kaji in the TV special Kin'iro no Corda ~secondo passo~, the group is now known as stella quintet+. They sang the theme song for the TV special, titled The score in blue.