I Kept Pressing the 100-Million-Year Button and Came Out on Top, Vol. 8 (manga)

With all the sword academies assembled, the Sword Master Festival to decide which is strongest finally begins!! Participating as representative of Thousand Blade Academy, Allen is thrilled to cross blades with powerful opponents. But at the same time, he can’t hide his unease about the dark power he awakened during his fight with the Obsidian Order…