"Every villain have their own painful backstory" Killing people brutally is Killer X's hobby. Innocent people are killed by him/her, one after the other. He/She will give the people he/she wants to kill with Deadly Card to let them know that they will die soon. Many people are afraid of him/her. That's why they have sent an investigator there to find out the identity of Killer X. Will they be able to identify the killer and defeat him? Or will Killer X be unstoppable?
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