After Kiba vanished, Kouga refocused on curing Kaoru. He ventured into another world and fought the Grou Dragon for the cure. With the help of Rei, Kouga got the cure and saved Kaoru. However, the gate that was imbued on Kaoru was activating and she'll become a vessel for Messiah to cross over. While looking into Messiah and Kiba, their investigation reveals everything is tied to Barago and Ker-ber-rose is allied with him. Realizing their common enemy is Barago, Kouga and Rei made peace and focus their attention towards the dark knight.