I don't wanna embarrass my sister so I'll get stronger!

A magic story where the main character gets injured protecting his sister.. a year later he was discharged with the care of his parents and sister however when he got out of the hospital he is needed to complete his grade because of the time lost in the accident thus studying with his sister in high school.. to his surprise she was very popular among the students and is even the student council president of the school she is also the top mage and part of the Magica Division consisting purely of mages.. With this in mind, he tries not to be an embarrassment to his sister and tries to catch up with her.