The bancho of Kurokoma High established a Banchos' Union after being ordered by Michio of Seirokai. He has the banchos who resist him attacked by "Kaze", who is a killer with a lethal top "begoma".
Saki and Okyo (disguised as boys in male-students' uniforms) infiltrate another all-boys school, Iioka High School, which is considered to be the next target. The bancho of Iioka High, Junji seems to be a coward.
The day that Kurokoma High and Iioka High are supposed to fight, both parties seem reluctant to brawl and the battle seems quite dull (this scene nods to Akira Kurosawa's classic samurai film, "Yojimbo" starring Toshiro Mifune). Saki and Okyo offer a confrontation to Kaze, and the yo-yo/bi-dama combination barely wins over be-goma.
Meanwhile, the battle between schools ends with Iioka's victory. Junji, finding out that Saki is really a girl, and feeling a little confident, asks Saki to be his girlfriend and she thrashes him.