Oh, man, is ep7 great. So beautifully, beautifully directed. And the relationships so subtly drawn.
The episode was storyboarded and directed by
Aoi Sayo 青井小夜. She has been a key animator at least since 2004, but only recently has been doing storyboards (Zero no Tsukaima Rondo) and episode directing and storyboards (Toradora, Umi Monogatari). As a key animator, she was involved in shows such as Aria, Darker than Black, and Hakaba Kitarou. But of course, the style is Kasai Kenichi's.
I'm definitely seeing three shows this summer that I consider candidates for "masterpiece" status: this, Tokyo Magnitude 8.0, and Bakemonogatari. All three are maintaining their high quality so far.