I adore this already. Yokoe is just wonderful in every scene - great design too - and now we have gyaru and siscons as well. Fun for everyone. I just hope it gets a little more explicitly yuri (doesn't have to get "serious") in general.
I love it all, except for the twin. I feel like it would make more sense for the younger sister to be around middle-school age instead of a twin. Her attitude would fit right in with the edgy rebellious middle-schooler type, and the big sister's "my little sister used to be so cute" siscon personality would fit better. As it is, I dunno..it just doesn't click for me.
(first couple is still my favorite. Gotta love those idiots)