“In a devilish fight I am only good.”
During Fighting Hearts, get only "Good!" in the quick-time prompts. You must stop the quick time prompt right BEFORE it hits the middle for a "Good". Basically, You get a "Good" for pressing it a little bit early/before it hits the middle.
Tip: Personally, I found it was much easier when I Turned the TV all the way down and turned Vibrate to OFF.