Seraph of the End manga volume 18 features story by Takaya Kagami and Daisuke Furuya with art by Yamato Yamamoto.

Yuichiro and his friends head back to the Demon Army to prepare for the final battle. At the base, Kureto struggles to stave off Shikama Doji from controlling his body. But things quickly begin to fall apart when Shikama Doji also tries to take over Shinoa and Yuichiro! Will they be able to stop the possession? Or will they lose their bodies to the first progenitor?