A choir (also known as a chorale or chorus) is a musical ensemble of singers. Choral music, in turn, is the music written specifically for such an ensemble to perform. Choirs may perform music from the classical music repertoire, which spans from the Medieval era to the 2010s, and/or popular music repertoire. Most choirs are led by a conductor, who leads the performances with arm and face gestures.

is a Japanese four-panel comic strip manga series written and illustrated by Tenpo Gensui, which began serialization in Tokuma Shoten's seinen manga magazine Monthly Comic Ryu in October 2008. The manga follows the everyday life of three high school girls. The first bound volume was released on May 20, 2008, followed by the second volume on August 20, 2009.