Pandora in the Crimson Shell: Ghost Urn Vol 15

From the Seven Seas Entertainment edition

POSEIDON ON THE PRECIPICE! The secret society Poseidon is finally ready to execute the Apollo Seed Project, even if it makes them enemies of the entire world! And they aren't the only ones moving into a new phase. Some major changes are in store for Nene, too!

Source: Penguin Random House API