Open The Sky: Spoiler for volume 25 omake is already out!:
As you may confirm on this page of a Manga Fox forum discussion, the user Sharazaque Faddile has found spoilers for the last Tankoubon, and I thought I should share it here. The tumblr user X24y25z26 has already posted the spoilers for the last one, but not the rest, so I thought I should do…