So many interesting things to point out here. For instance, the little mousy by Nazrin is apparently bathing with them. Small little details like those really make this picture more then what it seems (although now I can't help but think Byakuren's hair changes inversely when wet)
But seriously, Shou's back. Wow. Physically she seems like she would be the strongest among her group, so it's just lovely seeing her like that, even from the back.