Shinjirou Kusakabe

Shinjirou Kusakabe" (草壁信二郎 Kusakabe Shinjirou?)< is a music teacher and an adviser of the woodwind club. It is said his past is shrouded in mysteries.

Background
Shinjirou used to be a aspiring musical conductor, but for unknown reasons, became a music teacher.It was revealed in the anime that someone precious to him died on the day he was supposed to conduct the berlin symphony orchestra