^ I'd go with Neko. I LOVE Neko much more than Kuroge. Still Kuroge is a quality single.
1) The Neko PV is wayyy better than Kuroge's. And it's cute.
2) Natsuzora rocks.
3) The cover is awesome.
That's why I myself bought the single.
Don't get me wrong, Kuroge is one of Ai's best singles but I just feel Neko's better. And it's better than PLANETARIUM also.