Playing the euphonium is fun, and Tsubasa, a short-haired beautiful girl, throws herself into club activities with abandon. However, the club advisor who harbors lust for her figure commits a heinous act at the end of his delusions. She is confined in a dark, cramped room. Given aphrodisiacs and trained, Tsubasa turns into a plaything. The girl can no longer live without her teacher's meat stick...
