Volume 13 of Switch, a manga series following Kai, an investigator assigned to track down and stop the distribution of a dangerous new drug. Can the Narcotics Control Division save the streets from drugs' invisible threat?

Kai Eto may look like a squeaky clean kid, but the Greater Kanto Narcotics Control Division's new investigator hides a violent alter ego and a dangerous past. With his stoic partner Hal Kurabayashi, Kai is assigned to track down and stop the distribution of Dragon Speed, a dangerous new drug. But Ryugen, the syndicate trafficking the drug, is almost impossible to infiltrate. Add street violence and a jurisdiction war with the Meguro Police, and poor Kai is in for some very long days at the office.`

Final Volume!

Kai has a mental break after shooting a suspect. Fragments of memories surface as he tries to resurrect his past. As more details emerge, Kai must confront his other personality and its origin, which holds the key to his relation with the Ryugen and the secret of "switch."