i don't think the tragedy will ever happen if the Music Teacher confesses his wrong doings.
However, theres still the possibility that the step-father of Nanaka will still go nuts and do something brutal, like divorce or something don't you think?
But if the step-father doesn't go berserk, we'd probably see the real Nanaka
. but we probably wouldn't get a anime tv series called "Myself;Yourself", since something needs to change Nanaka to stir things up.
A mark of "7" to this ep. simply because it ended..finally.