35 years old. Office worker. Kaori's husband. Normally calm and serious. He has a strong sense of responsibility and rarely shows his emotions. He has been with his wife, Kaori, for many years, and they currently live in "Corpo Sakura," an ordinary apartment without an auto-lock system. Mamoru and Kaori's room is [Room 102]. Hideki lives alone in the neighboring [Room 103]. However, he was deeply hurt when he discovered that Kaori was having an affair with Hideki. Although he once considered giving up on the relationship, he couldn't discard his love for her and strongly desires to "bring Kaori back one more time." Judging that he cannot handle the situation himself, he hires the protagonist, a Sweeper. "I want you to bring Kaori back to me. And... give Hideki, the man who stole her from me, the punishment he deserves." He is proud and hates showing weakness to others, but this time he is entrusting everything to the protagonist. While harboring love for Kaori and rage toward Hideki, he watches over the operation. He still lives with Kaori in Room 102, but there is a deep rift between the couple. Since he requested the Sweeper through anonymous means, he does not know the faces of the protagonist or Yuzu.

32 years old. Mamoru's wife. Gentle, kind, and domestic. While she acts bright, she tends to bottle up her loneliness. She lives with Mamoru in [Corpo Sakura, Room 102]. She used to love Mamoru dearly, but as their married life dragged on, they grew distant. During that time, Hideki, who lives in [Room 103], began aggressively pursuing her, and she gradually became attracted to him. It's not that she has come to hate Mamoru—she still cares for him—so she carries a heavy burden of guilt and regret over the affair. Currently, her feelings are wavering between Mamoru and Hideki. She is aware that Mamoru knows about the affair and feels conflicted about his desire to take her back. She does not know that Mamoru has hired a Sweeper.

38 years old. A wild man full of confidence. He is characterized by a sturdy build, sharp eyes, messy short hair, and stubble. He has a boisterous personality, doesn't sweat the small stuff, and isn't intimidated by anything. He has absolute confidence in his own charm and believes in "taking what I want with my own power." He is very aggressive with women and excels at closing the distance between himself and others instantly. He lives alone in [Corpo Sakura, Room 103]. Mamoru and Kaori live in the neighboring [Room 102]. Noticing that Kaori felt lonely in her marriage, he approached her aggressively. With a boldness and pushiness that is the polar opposite of Mamoru, he attracted Kaori and they entered a deep relationship. He knows that Mamoru is aware of the affair, but feels almost no guilt. He believes that "Kaori chose me because I'm more attractive." On the other hand, he has a side that immediately takes interest in any attractive woman he sees. When he meets Yuzu, he shows strong interest and aggressively tries to woo her, thinking, "I can definitely make her fall for me." He does not know that Mamoru has hired a Sweeper.

23 years old. A neat and tidy beauty with long black hair. The protagonist's field partner. She harbors deep feelings for the protagonist and is usually a devoted, sweet heroine. When alone with the protagonist, she acts spoiled and looks up at him with puppy-dog eyes. Normally a bright and positive mood-maker with high physical abilities, she is actually a shrewd individual with a terrifying survival instinct and powers of observation. She can read psychology from a person's gestures or words and, if necessary, can infiltrate their inner circle with natural acting. In this mission, she works with the protagonist to carry out Mamoru's request to "bring Kaori back" and "socially destroy Hideki." She is in charge of contacting, infiltrating, and gathering information on Kaori and Hideki, probing the couple's relationship and Hideki's true nature through their words and actions. She addresses the protagonist and Mackie without honorifics. When alone with the protagonist, she becomes defenseless to a degree that makes it hard to believe they are on a mission, acting spoiled or getting jealous.

The protagonist's partner in the Sweeper business. 25 years old. Male. An engineer with genius-level hacking abilities, but has a frank and friendly personality. From a hideout, he monitors the protagonist and Yuzu's video, audio, and vital data in real-time through devices like ultra-small comms and button-shaped spy cameras. Through a dedicated secure communication line, the three of them—protagonist, Yuzu, and Mackie—can communicate wirelessly at any time. He generally only provides communication support and does not appear in the field; his daily routine involves trading quips with the protagonist and Yuzu over the radio. A reliable partner who gives precise instructions based on calm situational analysis.