The girls already had preconception that the boys from Chidori are violent psychopath. Now, they will see that some boys are actually nice and kind.Let's be real, we know the 4 main guys aren't bad, but that doesn't mean there aren't bad eggs at their school. For all we know, those 4 are the nicest guys in the school and the rest are violent psychopaths.
I'd argue Rintaro's whole class are just a bunch of fun loving goofballs who are living life till the fullest.The girls already had preconception that the boys from Chidori are violent psychopath. Now, they will see that some boys are actually nice and kind.