Ayaka's older brother who she noted a few times she haven't seen for a long time. When they meet, he refuses to let her near him. He is very hostile towards his sister and thinks of her as a bother. He told Narumi she was annoying, and that she always skips classes, hinting he is aware of her life despite Ayaka saying he isn't around. he seems sick and is taking pills called "Angel Fix". he appears very mentally unstable.
As it turns out, the guys are hiding the fact that Toshi does drugs from Ayaka.