After a bewildering end to the clash with the demons in the Empire, Suimei discovers he has more enemies in this world than he thought. Meanwhile, the intentions of the Universal Apostles are still hazy at best, and Duke Hadorious still has a hostage he can use against Suimei and the others. Will Reiji's new power be enough to protect them from all the looming threats? Picking themselves up after the battle will be hard, but then it's time to prepare for an unexpected journey... to the pool?