- Mamiko's conduct is just ... weird. What was she doing in Nagoya? Did she actually watch the performance, or did she just happen to pass by the congress center on the very day the Nationals were held? She knew Kumiko's school would be attending, right? If she tried to avoid Kumiko she sure didn't put a lot of effort into sneaking away either. Even when Kumiko finally catches up with her, Mamiko doesn't even bother to walk back to give Kumiko a hug. That's all just a bit odd for someone who supposedly loves her little sister so much.
- The auditioning system seems to make sense, because you only want the best, right? The issue though is that Kitauji's wind band is actually very small, and especially the bass section seems to be chronically understaffed. There only ever seems to be one contrabassoonist, for instance. So, what do you do if that contrabassoonist flunks the audition? Go without contrabassoon? You could try, but cutting one of the more important bass instruments would severally limit the number of works you could reasonably perform.
Headscratchers / Sound! Euphonium