A dark psychological isekai where the protagonist is trapped in a system designed to corrupt him through forced betrayal, while his victims are magically conditioned in ways that create layers of deception and tragedy.
The Setup
The MC's Situation: The protagonist is transported to a mysterious world and bound to a system. The system's stated purpose: to transform him into a monster.
The System's Mechanism: The system sends the MC into parallel simulation worlds. In each world, he is given a target character to approach and ultimately betray or kill.
The Rules of Betrayal
Killing Condition: The MC can only directly kill a target once he has achieved maximum trust with them.
The Betrayal Cycle:
Gain affection and trust from the target Betray or kill them when trust is maxed Return to reality (or move to the next simulation) What Happens to the Victims
Memory Transfer: When the MC returns to reality, his victims are pulled into reality as well. They retain complete memories of the simulation—including their own death or betrayal by the MC.
Forced Forgiveness: The system compels victims to forgive the MC and prevents them from feeling anger or hatred toward him. However, this forgiveness does NOT restore their trust.
The Victim's State:
They remember the betrayal clearly They cannot hate the MC for it They cannot trust the MC They exist in a state of conflicted limbo—compelled forgiveness without genuine trust The Path to Truth
Earning Trust Again: If the MC manages to genuinely rebuild a victim's trust through his actions, the magical restriction lifts.
The Revelation: Once trust is restored, the victim is finally given knowledge they were previously denied: the betrayals were forced by the system. The MC was not acting of his own will.
The Tragic Timing: By the time victims learn the truth, significant emotional damage has already occurred. They had to rebuild trust with someone they believed was a willing betrayer, only to discover he was a victim too.
The MC's Burden
Guilt Without Understanding: The MC doesn't know about the victims' compelled forgiveness or the eventual revelation. He only sees people he betrayed somehow... forgiving him, trusting him less, yet still present in his life.
The Question: As victims slowly regain trust and learn the truth, the MC must confront what the system actually did to him—and realize he's been internalizing guilt for something he was forced to do.
Core Themes Forced Corruption: Can you become a monster if you're forced to commit monstrous acts? False Forgiveness: Is forgiveness without understanding real forgiveness? Shared Victimhood: Who is truly the monster—the one who betrays, or the system that forces the betrayal? Psychological Isolation: The MC and his victims are both victims, but neither fully understands this until it's too late