Ikuo Ryuuzaki and Danno Tatsuya are 2 orphaned boys who were looked after by a person they called 'sensei'. Following their sensei's brutal murder, the two vow to hunt down the killers and the police officers who neglected to properly investigate the case. 15 years later, Ryuuzaki is a police detective and Tatsuya has become the leader of a group of mobsters. Helping each other out behind the scenes, they strive to rise to the tops of their respective fields so that they may exact their vengeance.

Saitō Yu'ichi, a young man without prospects, decides to kill himself at the turn of the year. However, a fateful encounter with a stranger, Mitsumune Sakutarō, who is his complete opposite, changes Yu'ichi's future in a way he could never have imagined.

Is there someone whom you desperately wish to see dead? If you want your enemies and rivals eliminated, free-of-charge and with no possibility of the crime being traced back to you, all you need to do is leave a message for "Usobuki Tadashi" in a certain telephone booth at a certain park. Soon afterwards, a black-suited man with cold, crimson eyes will meet with you and confirm the target. He cannot be prosecuted, for he kills through the power of suggestion and the clever arrangement of events. He will accept any request: regardless of whether the target is saint or sinner, and no matter how foolish, cruel or misguided the client... All with a mocking smile on his face that belies his quiet amusement in the face of humankind's never-ending folly.

Hikaru Kago is a former yakuza roped into cooperation with the police through plea bargaining. Takaomi Togasawa is an elite cop who'd rather be doing desk work. Follow the improbable duo as they survive each day as protection officers in charge of yakuza victims or targets, and find out why their assignment is called "the last bureau before heaven"!

Hikaru Kago is a former yakuza roped into cooperation with the police through plea bargaining. Takaomi Togasawa is an elite cop who'd rather be doing desk work.Follow the improbable duo as they survive each day as protection officers in charge of yakuza victims or targets and find out why their assignment is called "the last bureau before heaven"!