Greg could want to beat Katsuro as much as he wanted, as long as Katsuro was pinning him down he couldn't move. Katsuro somehow had the feeling that Greg wasn't fighting seriously, this caused him to be unable to fight seriously as well. However, it was quite annoying that Greg seemed to be using him to relieve his stress. "Listen," he said in a quite serious tone to the man under him. "I am not your personal stressball. Nor do I want to spent my time with a child that is throwing a tantrum. If you can't behave yourself like a normal person then fuck off. Do you understand that?"