Plot

Hero Academy's top student Arnest Flaming meets Blade, a transfer student who is roughly her equal. The king asks her to supervise and show him around. The quest to become true heroes begins!

Rosewood Academy isn't for your average student. This prestigious school specializes in training future heroes destined to protect humanity. Among them is Earnest Flaming, a young girl with unmatched skill who holds the highest record. But her reign at the top is challenged when she's assigned to mentor a new and carefree student, Blade, whose power rivals her own.—Crunchyroll

After defeating the Demon Lord, the great hero Blade finds himself on the brink of death. Though he miraculously survives, he loses a significant portion of his strength. Being stripped of his immense power frees Blade from the obligation of being humanity's savior. He chooses to spend his newfound freetime embarking on a new quest, making friends. Blade enrolls at Rosewood Academy, an institution that trains prospective heroes to become bonafide champions of justice. He quickly fits in, befriending his fellow classmates and helping them through the trials and tribulations on the path toward becoming a hero.—MAL Rewrite