Attack each other! Attack each other! Attack each other! Because of the setting of the article, no one is willing to be a weakling here, so mutual attack is part of the setting that cannot be changed. The one who wins can get the upper hand in a flesh-and-blood fight, and the life accompanied by the desire to conquer is happier. The protagonist is boxing in the early stage, and mixed martial arts in the later stage.
Purpose: After reading too many beautiful stories and legends of justice, we forget that glory and glory in this world are life-threatening. Survival is a fight to the death