A boy tries to talk to his ex after class at school. However, she just puts on some music and shuns him instead, leaving him to wonder why.
What type of music is she listening to, and why?
What sort of classes would you attend at school?
Some deliberate word choices were made for their "sounds like" functionality. (Specifically three words).
The answers to the above two hints are 1) Maths, and 2) Ex, Shun, and Why.