S1·E6 Lesson 6: Secession

The S orchestra is to perform before the A orchestra at the upcoming concert. However, Stresemann takes "business" leave and Chiaki is forced to take his place conducting the S orchestra. In a twist of events, Stresemann quits the S orchestra and in revenge against Chiaki, plans to lead the A orchestra in humiliating the S orchestra at the concert. With the concert just a week away, Chiaki becomes the S orchestra's new conductor. The piece performed in the episode is Symphony No. 3 Op. 55 "Eroica" by Ludwig van Beethoven.