This episode basically closes the Summer arc, but I have to say that this really made connections to the present time situation like the origin of Yukito's magical powers and his purpose. It also brings some light about Misuzu's condition. And one last thing is Kanna and her mother seriously kicks ass, but in the end it was pretty tragic.
I'm in love with this series; it's just SO well done and the animation by Kyoto Animation is just downright gorgeous. I SERIOUSLY hope someone license this because it'll look SO much better on DVD.