Nao attacks Natsuki, and Shizuru reveals herself to be a HiME while saving Natsuki. Meanwhile, Mashiro and Fumi go to confront the Obsidian Lord, who turns out to be Reito. Mikoto fights for Reito and defeats Mashiro and Fumi.

A large portion of the students are missing after the last battle. Haruka and Yukino look for Shizuru, and find her with Natsuki, who Shizuru has been inappropriately touching while she sleeps. Mai goes in search of the Black Prince to learn if killing the other HiME's Children will give her the power to bring back Takumi.