Invaders of the Rokujouma!? Volume 41 by Takehaya

The entire Corona House crew—plus a few new additions—is now on their way to Forthorthe. Unfortunately, their arrival won’t quite be the celebratory homecoming that Theia and Clan had imagined. While they’ve successfully returned with the Blue Knight, he’s only back in the solar system to prevent further tragedy. Ralgwin is somewhere, skulking in the shadows with terrifying new allies, and Koutarou is determined to keep the next would-be dictator from threatening the peace of the universe once again.