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Background Tenma`s love but he doesn’t know that. Seen as the quiet boy who stares into the sky, his secrets are revealed slowly. He is the famous Manga and anime writer for a popular tv anime. Also a budding guitarist, who is part of the Yagami school band. His deep love is for curry, which he mentions several times, eventually Tenma finds out and tries to talk to him about curry and make her own. Even though he has no clue about Tenma`s love interest he slowly notices that she is being nice and helpful towards him and becomes closer to her. Karasuma is depicted as a genius and can do anything possible, this annoys Harima. Harima finds out that Tenma has a crush on Karasuma and he is willing to do anything to stop that. The surprising thing is he was about to transfer to another school before Tenma intervened.
Later in the Manga he reveals at the end he has a serious medical condition and is un able to stay in Japan and must go to the USA for treatment, may be this was the reason he was about to leave at the beginning of the school year.