I Kept Pressing the 100-Million-Year Button and Came Out on Top, Vol. 6 (manga) — Syuichi Tsukishima

At the beginning of the second semester, every high school swordcraft academy is raring to compete in the Sword Master Festival, a major tournament for swordfighters. In this prestigious competition, there's an opportunity for a single first-year student to participate, provided they win the First-Year Tourney. Who will be the one to receive the coveted slot!?