Mahouka Koukou no Rettousei

魔法(まほうか)()高校(こうこう)劣等生(れっとうせい)(The Irregular at Magic Highschool) is a Japanese sci-fi fantasy series about a guy, Shiba Tatsuya, who is supposedly really bad at magic joining a magic highschool. He has a sister who is…into him. Also, shenanigans occur and our regular guy becomes an eco-friendly nuclear bomb equivalent.