Kiyokazu Kiyota, Shigeo Tachibana and Norio Arimura are childhood friends. Upon reaching the retirement age, Kiyokazu had to retire from his job, only to take up contract work at a Game Center. Shigeo owns an pub and used to run it until recently, having handed over the reins to his son, Kosei. Norio is a manager of a machinery equipment manufacturing plant. Back in high school, the three of them were part of the "Three Bad Boys" group. Kiyokazu is an expert in Kendo, Shigeo has a black belt in Judo, and Nori is an ex-military strategist. All in their 60s now, the trio get together to form a vigilance committee and patrol the neighborhood at night.
