I think its both male and female tooooooo OAO YAY!!
I am not sure thoguh.. i could not ge tonto the website really.. i think.. Soma will be invovled though?? because the Soma Saito group shared it to they're page.. 'v' (that page was not the page i learnt it from though..i found out by the original page.. 'v')

But YES i think... MALE AND FEMALE!! yaaaay

i just more males.. or at least more than one.. becasue the middle guy.. ugh.. i seen his hair in the silhouette.. i i don't like the look of it... (like... pointy like... i dont like that... ) i have not seen the full hair of course.. (they have not been shown yet.. but i just know i wont like it...)

Anyways... i dunno... how many guys and or girls... if there is girls??? might be feminine guys... like i said.. i cannot go onto the website.. so i do not know they Sieyuu.. (apart from possibley Soma..) but even then you could get a guy voicing a girl??? that seems to be picking up these days... (i remember when it was jsut males voicing males... and females voicing males... and females voicing females... but now.. its... like... so mixed.. o.o