Watch Blue Spring

Asashi High School for boys sees most of its students associated with gangs of some sort who spend their time looking for trouble and avoiding their studies. One gang, which includes Kujo and Aoki, arrives at the roof of the school to take part in a secret game that allows the winner to assume control of all the other gangs in the school. Kujo wins the game and much to the dismay of best friend Aoki shows little enthusiasm for using his power over rival gangs, which drives a violent wedge between the former best friends.