Tsuyoshi Kusakabe

He is one of Miho's classmates from her middle school. He liked Miho for a long time, but has had little success with winning her affections. During his first year in high school, he joined the track team and it's implied that he hung around Miho, who's usually with Yamato, as much as possible. During Yamato's absence from track during the summer, he became arrogant which causes Yamato put him in a headlock and treats him like how Kinugisa did to Yamato. Much like Yamato, he made a bold prediction at the rookie track meet to cover up his anxiety. However, with support from Miho and Suzuka and with Yamato's guidance, he was able to take first place, much to his own surprise. (Wikipedia)