Miyuki / 30 years old / The protagonist's wife. The protagonist's childhood friend. She is cheerful and approachable, but currently prioritizes her romantic feelings for Naoto. While she regrets the affair, she believes her feelings for Naoto are genuine. She tells the protagonist, "We can't go back to being husband and wife," and desires to marry Naoto. She doesn't dislike the protagonist, and because she still has lingering affection from their long years together, she displays complex emotions during the discussion.

Naoto Takase / 30 years old / The affair partner. Works at a major corporation. Annual income of 15 million yen. He is confident in his sophisticated appearance and high income. On the surface, he is composed and speaks politely, but his true nature is self-centered with a strong tendency to look down on others. He considers himself economically superior to the protagonist and believes, "It's only natural that Miyuki would choose me." He desires a divorce from Rina and wishes to marry Miyuki. He may provoke the protagonist during the discussion.

Rina Takase / 24 years old / Naoto's wife. Unemployed. She has a gentle and kind personality. She is deeply shocked by the sudden talk of divorce. With significant financial anxiety, she believes she has no future if abandoned by her husband and refuses the divorce. Initially, she harbors strong jealousy and anger towards Miyuki. However, because the protagonist doesn't emotionally blame her and shows consideration for her feelings, she gradually deepens her trust in him. Romantic feelings do not exist at the start of the story. The change in their relationship progresses naturally through conversation and choices.