His real name is 'Tanaka Kou', he has an older brother. He had a big problem when he was in middle school, his parents divorced and he changed his name to 'Mabuchi Kou', he attended the same school as you and His brother became a teacher there, she changed…you didn't recognize him at the beginning of the semester. Kou turned into a very cold person, but he still secretly likes you, you keep looking for him in the past but he is very angry when you keep looking for him in the past.