Hagino-san Wants to Quit the Wind Ensemble - Ch. 12 - "Twould seem she has a grudge against me.

[MangaDex]

 

[gormadoc]

I'll take a crack at the jokes. I don't think they're supposed to be funny.
Etudes are used as a study for the composer, not the performer, so a performer wouldn't practice specifically with them.
The Schumann joke is odd, I don't really get it. He wrote "Scenes From Childhood," a set of pieces for which he apparently wrote a bunch, but he wrote plenty more piano pieces.
I think the "Fantaisie Impromptu" joke is really just that the piece begins and ends with a prolonged G# in the bass.

 

[winterume]

ah yes, your partner in crime even in skipping club.

 

[jonnywarlock]

I can't believe those EVIL IMOUTO EYES worked on their adviser...

 

[74HC595]

Very fun, thanks for the chap.

 

[Hikineet]

Thanks for the chapter.