The night of the third murder, Sam meets the Naked guy lying on the busy street of Shibuya-city. The Naked guy wearing an enigmatic smile on his face gets arrested right in front of Sam’s eye. Summer season begins and all the youngsters head for and gather around Shibuya and Shibuya turns into a gigantic disposal site of human instincts. Those who gather around Shibuya cares less about the serial murder and the city crawls around like a creature as its usual self, waiting for something to happen.

Juzo Murasaki is a young man traumatized by his experience of bullying at school. He returns to his hometown and takes a job on a building site with his old nemesis Toru Akai. But Juzo's trauma has created a monster; he harbors a second personality, Neighbor No. 13, a vicious, brutal and disfigured character intent on exacting a painful revenge on his bully.