Shiryokaku is forced to struggle before the great offensive of the Galan army. In that moment, a new machine god descends from the sky!
Gravitational collapse finally begins on the battlefield, which seems to have regained balance due to unexpected reinforcements.
There are only a few time limits left. The sea movement is directly above, and can our Mazinkaizer SKL (skull) crush this unprecedented crisis! ??
ガラン軍の大攻勢の前に、苦戦を強いられる八稜郭。その刹那、天空より新たなる機神が舞い降りる！
予期せぬ援軍により、均衡を取り戻したかに見えた戦場で、ついに重力崩壊が始まる…。
タイムリミットは残り僅か。海動は真上は、そして我らがマジンカイザーＳＫＬ（スカル）は、この未曽有の危機を打ち砕く事ができるのかっ！？
