Hana no Akuta

Tsubaki is an undercover investigator who has infiltrated the Soga gang with the intention of dismantling the Shintou Group entirely. However, his schemes were interrupted when Kajiro, the successor of the Soga gang at the time, saw through Tsubaki's disguise. Instead of expelling him, Kajiro allowed Tsubaki to decide his fate. Meanwhile Tsubaki uncovers that the Senior Superintendent of the police department was in collusion with the former head of the Soga gang, prompting Tsubaki to kill both in a sudden rage. This act awakened a latent thirst for blood within him that Kajiro embraced wholeheartedly. Although Tsubaki opted to remain alongside Kajiro, he continues to fulfill his duties as an undercover cop.