The Butler, Listening Quietly is Chapter 121 of the Kuroshitsuji manga.
Though astonished by Funtom Music Hall, Blavat Sky wills himself to calm down, musing that it is a "pale imitation" of Sphere Music Hall. Determined to demonstrate the "power of the original," he tells a servant to watch the Phantom Five performance in order to gather intelligence. He, then, returns to the Starlight Four, who inform him that the Phantom Five consists of their underclassmen back at Weston College. Blavat urges them to put on a show that is more brilliant than usual so that they can restore the audience's faith in them. To Gregory Violet's horror, Blavat orders them to perform two songs instead of just one. When Herman Greenhill says that they are still rehearsing the second song, Blavat stresses that they shine most brightly on stage. They, then, agree to do the two songs.
The Starlight Four climb back on stage, to the audience's delight. While Blavat watches, they announce their two new songs: "Search for Sirius" and "Paradi☆Sphere." They proceed to perform the songs, convinced that the stage is the only place they belong to. When their performance comes to an end, a satisfied Blavat walks off. While Herman, Edgar Redmond, Lawrence Bluewer thank the audience, an exhausted Gregory gasps for air and then collapses, to their collective shock.
Assured that Sphere Music Hall still has the upper hand, Blavat opens the door to the outside, and finds, to his surprise, a multitude of customers who are eager to attend the sold-out Phantom Five show.