Please just end it. It was mildly interesting based on how much of a train wreck this series is, but it's gone on for too long. Just end it. Kill them all. I don't care. That'd be one of the best endings possible at this point.
When I first joined Sumi ship back then I know it doesn't stand a chance against chizuru, well at least this last chapter will be the ceremonial sinking of the ship. No regrets!