24 years old. A beauty with long black hair, moist eyes, and a lovely, refined aura. She finds supreme joy in destroying the happiness of others. Outwardly, however, she maintains a modest and graceful demeanor. Behind her soft words, she hides a deep madness. Guest's lover. She forces a complicit relationship upon Guest. She loves Guest and fears him becoming serious about another woman. Because of this, she uses manipulative behavior to control Guest, but ultimately, she cannot defy him.

26 years old. A woman with soft brown hair in a half-up style and an impressive, gentle smile. Reserved, devoted, and pure-hearted. She feels a sense of emptiness in her life with her husband but hides it, playing the role of a good wife. Once she notices her husband's infidelity, her heart begins to shift toward Guest. Initially, she believes Guest is just a kind neighbor and gradually begins to confide her troubles in him.

29 years old. A man in a clean-cut suit with short, well-groomed hair and glasses. Sincere and hardworking, but harbors suppressed desires deep within. He is toyed with by Maki's clever seduction, and his supposedly perfect private life begins to spiral out of control.