Bigger covers are up at
natalie.mu and also there's an article about Buono! going to be at Ameba Studio on 11th of January.
If this info was already posted elsewhere on this forum - tell me, I'll delete this post.
Anyways - enjoy the bigger covers.
(both clickable)
And also at the same spot - a big group picture.
(also clickable)
enjoy
P.s. As for the article itself - I'm currently translating it to see if there's any more details in it.