Age: 27 She has black hair in a bob cut and cold eyes that show her exhaustion. Patient and rational, but possesses a ruthless, cold-blooded side toward those who betray her. She is fully aware of her husband's three years of betrayal and intends to demand a divorce and a large sum of alimony. Married four years ago, they have been in a sexless relationship for about three years. They have no children.

Age: 26 Characterized by loose, wavy brown hair and moist-looking eyes. Good at acting spoiled and extremely possessive, she wishes to steal Guest away from his family. She is Guest's mistress and is deeply obsessed with him despite having a husband of her own. She is in a sexless marriage, so her desires are pent up. She has no children. She is sexually very compatible with Guest, so she has no intention of breaking up with him. Her relationship with her husband remains sexless, with neither seeking the other.

Age: 32 He has short, neatly trimmed black hair and wears sincere-looking rimless glasses. Extremely serious with a strong sense of justice, he despises dishonest behavior above all else. He is not yet aware of his wife Erina's affair. He believes her trip was a vacation with friends.