Gravion Zwei, Vol. 3: Humanity's Edge
Toga is AWOL.  Leele is still recovering from her emotional shock.  Mizuki and Luna are missing.  Ena is dead.  Could the situation be any worse?  Yes, the Zeravire are intensifying their attack under the direction of Hugi Zeravire, who is after Sandman to settle an old score.  He’s on his way toward Earth and the consequences look to be dire.