Etude wa Ikkyoku Dake (エチュードは1曲だけ) is the cool-type ending theme for the first season of THE IDOLM@STER Cinderella Girls Theater anime. It first aired along with the 5th episode, both web and television, on May 2nd, 2017. The song is performed by a five person idol unit, and the outfit they wear is called Etude Oversized Shirt.
