On the note about "east" and "west": While "wrong side of the tracks" has a nugget of truth, in this series it's more accurate to point to the earlier class conflict between the super-wealthy students (and sponsors and donors) of the west and the merely upper-middle-class folks of the east that Kaede, Rin and, to some extent, Hayato Yuuki were primarily responsible for taming during the years just prior to Wataru's class of first-years entering.