Bone Diviner.

Summary

Yang Hong Jun meticulously planned revenge against a gang leader who killed his brother. He infiltrated a banquet by disguising himself, hiding tools in the bathroom, and using a borrowed invitation. At the opportune moment, he tranquilized the target in the restroom, transported him to an abandoned farmhouse, and psychologically tortured him for two days. Instead of physical harm, Yang Hong Jun subjected the victim to extreme mental torment by creating constant invisible psychological pressure, denying food and water, and maintaining an unpredictable, terrifying presence that broke the victim's spirit more effectively than physical violence.

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