Mhm, the performance was sad, because the song is very sad. But it was really one of my favourite performances of the whole concert...and I liked their outfits too!
Though my favourite outfits were the ones they wore during "Let me down"!!
Jup, I also think that a PV doesn't need a high budget to be beautiful. Like you said, "Hatenai sora" wasn't something amazing, but it was nice. And I wish they would get a PV like "My Girl" again. It was so great and it had a real storyline. I'll never get tired of watching this PV!!