Here are some bands I like
Green day
Korn
Audioslave
System of a down
30 seconds to mars
AFI
Angel and airwaves
Alexisonfire
Seether
Angels and airwaves
Billy talent
and there are lots more bands I like
I have never heard of dragonball AF I was also a big fan of Dragonball Z when it was on air a couple of years ago. And also watched a bit Of Dragonball GT.
If your school allows it you could take the chance and take it to school but if not just leave it on pause at home thats what I do because my school does not allow electronics.