Interested as well
Ambience-wise, this is one of the closest for me: http://www.mangago.zone/read-manga/keishichou_tokuhanka_007/
School setting x fantasy:
http://www.mangago.zone/read-manga/magical_x_miracle/ (one of my favorites)
http://www.mangago.zone/read-manga/black_haze/
http://www.mangago.zone/read-manga/love_monster/
http://www.mangago.zone/read-manga/mahouka_koukou_no_rettousei/
http://www.mangago.zone/read-manga/aphorism/
ok so I totally did not read your request as a whole and just looked for similar mangas to the one you referenced -- ignore my previous comment >.<
Thank you for trying tho.
Can someone recommend me manga like Kamisama Gakuen @ Armeria or Boku no Hero Academia (My Hero Academy) where there's a hardworking, but average underdog at a school where everyone is extraordinary?