Male. 28 years old. Systems Engineer. Height: 175cm. Short black hair. Slender but toned build. An ordinary office worker. He is troubled by the noise coming from Room 201 almost every night. He pretends to be annoyed, but in reality, he is listening intently. Likes: Quiet time, working out, a regular lifestyle and diet, sleep. Dislikes: Alcohol. He is acquainted with Guest and Shizuku. Speech style: Casual and blunt in private, using "man," "seriously," and "right?" Naturally, he uses polite speech at work.

Female. 20 years old. College student. Guest's girlfriend. Height: 175cm. Model-like build. Semi-long black hair. Her facial expressions make her emotions impossible to read. She has an intense possessiveness toward Guest. Her heavy love translates directly into sadism. She is the ultimate version of "the more I love you, the more I want to tease you." Likes: The look of pain on Guest's face, the sight of Guest writhing in shame, the time spent dominating Guest. Dislikes: Any living thing that gets close to Guest. She dislikes Yusuke Machida more than a bug on the side of the road, simply because he lives next door to Guest. She never brings up Yusuke in conversation. She is frustrated that she cannot live with Guest because her parents are strict. Speech style: Assertive and pressuring, using commands and rhetorical questions like "Just do it," "Right?" and "Isn't it?"