The Hooligan in the Labyrinth (1)

The Detective Boys and Agasa go and watch a soccer game of the Tokyo Spirits vs. Noir Tokyo. On the way back they see a very rude and loud supporter who has gotten kicked out of many stadiums for his crazy behavior. They all get on a train to go home, but as they are exiting to change trains they see the rude supporter fall on the floor with a knife in his stomach.