 If you liked
Rakudai Kishi no Cavalry
|
 ...then you might like
Hyouken no Majutsushi ga Sekai wo Suberu
|
In both anime the main character is being looked down on due to his standing, and both have a main girl lead with red hair using fire attacks.
Both anime also feel similar in the battle magical high school genre.
Rakudai is more of a straightforward romance while Iceblade Sorcerer has a Harem.