Kiba becomes entrenched in battle against Karlamine, one of Riser's knights, while Akeno fights Yubelluna, his queen. Meanwhile, Issei takes on Ravel and the other remaining pieces. Rias launches an all-or-nothing sneak attack against Riser.

Issei wakes up to find that the battle is over, and he has lost. Rias and the others are at a party in honor of her engagement to Riser, but with some help from Grayfia and Asia, Issei decides to crash it, rescue Rias, and bring her home with him!

Issei is back with Rias and Asia living in his house, and Kiba starts acting weird when he sees a picture of a holy sword at Issei's house.

Issei battles Vali and discovers hidden depths to his power as the Twin Sky Dragons face off.