Here’s the cover of Jump SQ #12 magazine featuring GATE 7:

Source: Jump SQ.
Apparently this will be the image of the alternative cover for volume 2, which goes on sale on the same day as the magazine, November 4.
Here’s the cover of Jump SQ #12 magazine featuring GATE 7:

Source: Jump SQ.
Apparently this will be the image of the alternative cover for volume 2, which goes on sale on the same day as the magazine, November 4.