Shiina Underground - Shiina vs Don (Patreon)

Somewhere in the Tokyo Metropolitan area a certain warrior arrives at an underground fight club, looking for a fight to boost his reputation. That man is Don, a fighter all too aware of his resemblance to a particular Martial Artist. He wishes to show that he is not what he seems and wants a serious challenge. However, the person willing to face him is far from what he expects, mainly because she's a High School student.