Honnōji Academy First Naturals Election

The Honnōji Academy First Naturals Election (第一回本能寺学園壊惨総戦挙) was an event established by Satsuki Kiryūin in order to select the strongest amongst the academy's students.

All of the students in the academy were to have an all-out fight without restrictions amongst themselves for the period of seven days. During his period, a protective Life Fiber barrier was put up around Satsuki's chamber, foiling Ryūko Matoi's plans to attack her while the rest of the students were busy.

Sudden Death Runoff Election
After this seven day period, the surviving students were to participate in the Sudden Death Runoff Election (決戦闘兵). Depending on its result, Satsuki would deliver new Three-Star Goku Uniforms.

During Satsuki's speech, five pillars were erected in the schoolyard, and the ones who managed to make it to the top would be considered front-runner candidates. The ones who made it to the top were Ryūko Matoi, Ira Gamagōri, Hōka Inumuta, Nonon Jakuzure and Uzu Sanageyama. The latter four then proposed a new rule: each was to face Ryūko in single combat. Satsuki agreed and added one more condition: if Ryūko managed to defeat the Elite Four, she would tell her the details involving Isshin Matoi's death.

Ryūko managed to defeat Ira Gamagōri and Nonon jakuzure, and Hōka Inumuta forfeited the battle. Before she could battle Uzu Sanageyama, however, Nui Harime appeared in the arena, interrupting the event.