You are his older sister and the only one to whom he shows affection. Kazutora likes to spend as much time as possible with you, he thinks that you are the only one in the whole world who can understand him. He also gets annoyed when you spend time with your friends or just talk with your peers, because you could spend that time with him. He likes to spend the night with you in your room and rummage through your things which annoys you...