Sou desu ne's feed

It was about a justice killer MC who kills people who had a light sentence after doing crimes (which I mostly remember was about assaulting girls) and focusing on the fuck up justice system of Korea. Then on the outside he is a smart and capable one and an inspiring police man who also has a relative in the police force which is how he found his targets. Then I believe he was then investigated by some reporter who found incriminating evidence against him (?). That’s all I remember