Keigo Kuramata

He is Chiyukis 26 year old cousin who shares a brothersister bond with her. He is very protective of her due to her health issues he can also be very possessive of her. Chiyuki believes that he left for the United States to study English but the truth is that he is studying to become a heart specialist for her sake. He tries to separate Chiyuki from Tya. He even goes so far as to try to kill Tya with a rock but hits Chiyuki instead.