Mikado, Masaomi and Anri continue their peaceful everyday life. But this is just the tip of the iceberg because the three friends are still unaware of others real status in Ikebukuro. Anri, who noticed the strange behavior of Kida, decide to investigate and eventually finds out what is wrong with his friend.

Meanwhile, a gang war starts to break out between the Yellow Scarves and the Dollars over the identity of the Slasher. As the aggressions towards Dollars members are getting more and more frequent, their leader is seriously thinking about a potential disbandment.

What Did Anri discover about Kiba? And can the gang war be really put to an end?