Blue Spring (青い春, Aoi Haru) is a Japanese graphic novel created by Taiyo Matsumoto. It is an anthology collection of short stories, all revolving around teenage boys at high school and the lives they live. A live action film adaptation was released in 2001. The manga was licensed for an English-language release by Viz Media.
Kujo becomes the official leader of a gang and must constantly defend his position by playing a dangerous rooftop game with the other boys vying for his position.