In CPA-4, there’s a rapid rise of psychopaths. After WW3, they began appearing. Some of them possess enormous superhuman power.

Jodan, A shut-in who spends his time only playing games. One day he picked a strange diary near a junkyard on his way to buy food supplies. However, things get twisted as he gained a power called the ‘Psychopath System’ by picking the diary. Each day one human has to be killed in order for him to survive. Would the weak-hearted Jodan cast his humanity for his existence?