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73 chapters

13 volumes

2002 – 2008

In the Narcotics Control Department of the Bureau of Health and Welfare, Kai Etou and Haru Kurabayashi start their careers as crime investigators. At 22, Kai is kind-hearted but struggles with physical strength and finds it difficult to harm others, even when necessary. Joining the department as a "matori"—a term for narcotics investigators—Kai aims to help those battling drug addiction. Haru, a self-aware and hardworking colleague, initially sees Kai as ineffective and too lenient, keeping his distance. Their first assignment involves capturing a well-known drug dealer. During the operation, a physical fight with the suspect triggers a sudden shift in Kai, turning him into a relentless force. As Kai and Haru investigate more drug-related cases, they gradually uncover the mystery behind Kai’s sudden behavioral change and his hidden past. Included one-shot: Volume 5: Drug Hunter (prototype)