The curtain closes on the graduate farewell event, the "Great Randori." The danger to their partnership from Nagi's return to school having passed, Ayana and Hayate's swords have safely found homes in their old scabbards. Then, during the graduation ceremony itself, Hitsugi announces a date for the Summit Battle between the Amachi Hitsugi/Miyamoto Shizuku and Mikado Akira/Inori Sae pairs. At long last, the duel staking the very existence of Tenchi Academy itself will commence.
Not until the end of this volume, however, seeing as we just finished a huge battle arc and need some downtime for character development.