Saki's mission is to confront "Yaju-gumi" in Aoba Gakuen. Yuju-gumi are a group of three brutal boys who are about to come out from a juvenile jail.
They are getting our earlier than planned because of a back-up power, and this power is the real enemy that Saki has to confront.
Aoba Gakuen is in panic now because Yaju-gumi is coming back today at midnight. Saki offers help to the student union leader Kawamura who sent them to jail, and who is out of help now, and she gets bombed and injured.
Though all the students and teachers escaped from the school, Saki remains and prepares to battle Yaju-gumi. Seeing that, Kawamura and others also come back to help her. She lures Yaju-gumi into the school and defeats them by using a trap she had set in the school. After the battle, Yukino and Kyoko meet her.
