Kiyota Kiyokazu, Tachibana Shigeo and Arimura Norio are childhood friends. Upon reaching the retirement age, Kiyo had to retire from his job, only to take up contract work at a Game Center. Shige owns an izakaya (Japanese pub) and used to run it until recently, having handed over the reins to his son, Kosei. Nori 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. Kiyo is an expert in Kendo, while Shige has a black belt in Judo, and Nori is an ex-military strategist. All in their 60's now, the 3 of them get together to form a vigilance committee, and patrol the neighborhood at night.