Blackmail Is My Life

Shun Muraki is a low-level blackmailer who specializes in extorting money from prosperous Tokyo businessmen by threatening to reveal their crimes and indiscretions. His crew includes the former yakuza member Seki, the failed boxer Neguchi (nicknamed "Zero"), and the alluring Otoki. They regularly meet in their hideout in the back of a restaurant and follow the three rules of blackmail: don't make any new friends, don't push too hard, and never hit the same mark twice.