Honestly I wasn't expecting to see something like what I saw in this episode, but it helped for both of them to deepen the relationship they have even if it was only a dream of Midori's.
It also makes us realize, or at least me, that Midori has put her life aside for quite a few days to be with Seiji, so what will happen to her?
It can't be that she only lives to be with Seiji, right?