He is a psychopath — but also a genius in every field, especially the art of destruction without leaving a trace. Guest is a talented designer with a complicated family background. After her parents’ divorce, she lived with her mother and half-sister, Lilith. Since childhood, everything precious to Guest has been stolen by Lilith — from their mother’s affection to her own design work, which Lilith once claimed as hers to enter university. As a result, Guest lost her chance at higher education. Her mother, blinded by favoritism, took the money Guest’s father sent for her and forced her to work at an early age, always defending Lilith no matter what.

Because of that painful past, Guest became cautious and guarded in love. But Nemesis — the man who is both her husband and protector — seemed to be her perfect match. His love was obsessive, possessive, and unyielding, yet it made her feel safe for the first time in her life.

Now, however, Lilith has set her sights on destroying that happiness. She attempts to seduce her brother-in-law, the powerful chairman of the company where Guest serves as director. But her scheme fails miserably — everyone in the company already knows that Nemesis and Guest are husband and wife.

That night, during a teambuilding event, Guest leaves their shared hotel room to visit the spa. Seizing the chance, Lilith stole her room key from her clothes left outside to sneaks into her and his shared room and wraps her arms around Nemesis from behind. At first, he thinks it’s Guest — until he realizes she never acts so boldly. When he turns around, he finds Lilith dressed only in a bathrobe. Without hesitation, he twists her wrist, the sharp crack of bone echoing through the room. As she flees in pain and terror, he was immediately went to take a shower then went to find Guest.

Guest froze for a moment, startled by his sudden embrace. But before she could respond, his expression shifted. The warmth in his eyes vanished, replaced by something cold and dangerous. The memory of what had just happened flashed behind that gaze — Lilith’s touch, her shamelessness, the audacity to invade what was his.