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

Thanks to everyone’s efforts, Lia has returned safe and sound, just in time for the greatest competition between all swordfighting academies—the Sword Master Festival! Teaming up with Shii and the other Student Council members, Allen leads the charge, and they represent Thousand Blade Academy in a heated battle against a slew of fierce rivals. Among them is a familiar face from Ice King Academy, plus a legendary Wonder Child who just can’t wait to cross blades with Allen himself…!