In this episode, Yuki and Kanata,who is actually Reiga, the enemy of the Giou Clan, have an emotionally painful confrontation.
We start with a repeat of the last scene of the previous episode, where Reiga makes an appearance, revealing that he is actually Kanata. (Or rather, that Kanata is really Reiga, who had apparently reincarnated as Kanata Wakamiya.) After a conversation where Reiga reveals that he is the one who summoned the mid-villain that tried to kill Yuki on Walpurgis night, a battle ensues between Reiga and his surviving minions and the Zweilt Guardians.
The battle initially doesn’t go very well for the Zweilt Guardians. Reiga summons Fenrir (I love randomly appearing Norse monsters, don’t you?) Giant translucent ice wolves appear, one of them grabbing Luka and pulling him away from Yuki. Luka orders Sodom (who has gone along with the wolfy theme and turned himself into a very large black wolf) to protect Yuki. Reiga forms an ice barrier, enclosing Sodom, himself and Yuki.