By Justice or Mercy is an adult visual novel where you play as a quiet, quick-tempered, but ambitious young man. Four years after being painted as a murderer, you are on your way home after previously running away. Things are different now though; a burning desire for “Justice” has been lit inside you, and you’ll stop at nothing to take back what they took from you. What will your version of justice look like, though? What methods will you use? And how far will you go? It’s up to you to decide how you achieve justice, but one thing is for certain: Justice won't be achieved until you’ve taken everything from those who wronged you.