The BD-BOX comes in 4 volumes and 7 BD discs, with each cover and disc receiving an art illustration, featuring different characters from the series.
The disc contents was previously covered here.
The following are the covers of the 4 volumes;
Releasing in stores nationwide on May 27th for ￥29,258 (after discount) at Amazon.
Finally in glorious HD! (＾∇＾)