07-GHOST Vol. 16 (manga)
Years ago, the Seven Ghost Landkarte succumbed to a dark desire to eradicate all sin by simply erasing humanity. His plan has run unchecked for years, and now Frau, Teito and fellow Seven Ghost Ea are the only ones left standing in his way. If Teito hopes to continue on his journey to seal the evil god Verloren, then he'll have to find a way to forgive even this most irredeemable of souls.