Seasons & episodes

A crow Child causes Mikoto to fight and kill Akira's child. Mai arrives in time for Takumi to evaporate in her arms. She and Mikoto then battle, while Mikoto flashes back to how her brother is the Obsidian Lord.

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.

Midori wakes up Miyu with the key given to her by Mashiro. Mikoto tries to stop her, and Mai learns that Mikoto works for Reito now. Meanwhile, Shizuru defeats Yukino and Haruka evaporates. Yuuichi learns from Natsuki that Mai has feelings for him and goes in search of her.

Shizuru destroys Nao's Child, killing Nao's hospitalized mother. Shiho turns out to be a HiME and attacks Mai. Mikoto kills Shiho's Child, and Yuuichi evaporates as Mai tries to explain that she loves him.

Shizuru and Natsuki battle and then evaporate because of their love for each other. Miyu goes to kill the Obsidian Lord. Mai goes after the Black Prince as well, but Mikoto shows up to stop her with her Child.

Miyu wakes up Mashiro from a frozen block of ice. Mashiro then revives all the people who had evaporated. Mai and Yuuichi defeat the Obsidian Lord, and everything returns to normal. Reito and Yuuichi want Mai, and Mikoto doesn't want to share.