Matt leaned back and made polite noises, adding his own subdued murmur to the class's morning greeting.  There wasn't much point to this class - his English was perfect and he didn't have much patience for the easy A - but the school valued conformity and blending in, so he took it without complaint.  And, of course, there were plenty of less entertaining ways to waste an hour than watch Ningyo-san caper in front of the class and bask in their adoration.