CyberneVIc (Osomatsu-San Fan AU)

In the year 2056, cybernetic modifications grew popular across Japan. Though they were traditionally used to aid with hospitalized persons with their healing processes, scientists quickly discovered that a certain fluid used in those modifications could make humans immortal. This discovery was publicized, leading to many people getting these modifications done. A few of those many people were the Matsuno brothers. 5 of them, at least.
Later on, Japan's government noticed these surgeries being done and swiftly banned it to prevent overpopulation. Because of this, an organization who wants to use immortality for their own, selfish gain, develops 30 years after the ban. They pray on people with immortality, killing them and returning their fluids to their base. Most cyborgs are in hiding because of this threat, but others take a stand against them.

The CyberSix, composed of the Matsuno Brothers, developed high technology weapons thanks to Professor Dekapan. They're famous around their part of the city, but a serious threat to the organization. After nearly a year of holding back the attacks, one of the brothers decides to step up and take the threat on head first, planning to terminate the organization once and for all. Some of the brothers agree with this, and others not so much.