Classroom for Heroes Eiyuu Kyoushitsu English Subbed

The story is set in Rosewood Academy, a school that trains future heroes destined to protect mankind. The school accepts only those with the most potential. Arnest Flaming, a girl who boasts the top record in the academy, is assigned to guide a mysterious but cheerful new student named Blade who rivals her own power.

(Source: Anime News Network)