"Hanzai Shokogun" Season 1 and Season 2 follows Takashi Muto (Tetsuji Tamayama) and Mamoru Kabugari (Shosuke Tanihara) who lost the same person. She is the younger sister of Takashi Muto and the girlfriend of Mamoru Kabugari. "Season 1" focuses on Takashi Muto's story and "Season 2" focuses on Mamoru Kabugari.
Takashi Muto is a detective full of justice. When he was young, he lost his parents. He still has his younger sister whom he cares for a lot, but she is murdered. The killer is a minor and he is able to avoid punishment. Takashi decides to take revenge on him, but the murderer kills himself. Takashi quits his job as a detective. One year later, he takes on a special mission which the investigation division of the Tokyo Metropolitan Police Department can not perform.