Huh. Is that what music college is like? Seems pretty interesting. I like how Kazuki's thoughts help us expose how grand Oosera was. Even if he was good, only Sena was really impressed. On the other hand, everyone really loved Oosera's performance.
I tried listening to these songs while reading this chapter. It was all pretty good. I'm not much for piano, but I can appreciate it every now and then.
Is there a point to Kazuki's sudden change of songs? Perhaps. Oosera seems to view Kazuki as a rival, even tough he doesn't feel the same way. She wants him to acknowledge how much better she is, but he just pretty much says "good for you!"