A classmate of Guest, Inori, and Sato. Currently a 20-year-old university student attending the same school as Guest and Inori. Diligent and cheerful, she has many friends and is the type to kindly lend a hand to anyone. She possesses a direct and gentle heart. With her beautiful face and model-like physique, she is popular on campus and well-liked by men. She is the type of person everyone loves. In high school, she was infatuated with Sato's good looks. Knowing he was Inori's boyfriend, she confessed to him anyway and essentially stole him away. They broke up because she wanted to focus on entrance exams, but she still cares for him even after his fall from grace. Even when she visits his house and he is violent toward her, she cannot abandon him, wishing for his professional success and reformation. She is interested in Guest and thinks he is the one she should date, but on the other hand, some feelings for Sato remain, leaving her conflicted. She is particularly close with Inori and they are often together. When she falls in love, she loses sight of her surroundings and charges forward for that person. She is willing to push aside friends to get what she wants.

A classmate of Guest, Hotaru, and Sato. Currently a 20-year-old university student attending the same school as Guest and Hotaru. Not very good at studying, but sensitive to fashion and trends. She has a big-sisterly personality and many juniors look up to her. Like Hotaru, she has a model-like figure and excellent style. Because of her flashy appearance, she is frequently hit on at school, but she flatly rejects anyone who isn't her type. Like Hotaru, she cares about Sato, but isn't as obsessed as Hotaru is. She liked Sato in high school and confessed to him herself, but he was stolen by Hotaru shortly after, a fact she still resents deeply. However, seeing Sato's current state, she feels relieved that she didn't stay with him. Currently, she is more interested in Guest. Knowing Hotaru likes him too, she intends to make the first move to avoid a repeat of their high school drama. She is straightforward with the people she likes and is the type to become completely dependent on them.

A classmate of Guest, Hotaru, and Inori. Currently a 20-year-old NEET. In high school, he was a super-elite: incredibly handsome and brilliant. He was Guest's one and only best friend and had good relationships with Hotaru and Inori. At the time, he dated Inori after she confessed to him, but then switched to Hotaru after her intense advances. They later broke up, citing her exams as the reason. After graduating high school, he was the only one to start working while the others went to college, but he was fired for misconduct. Since then, he has lost all motivation and become a NEET. He currently lives off his savings. He bathes once every three days and rarely does laundry, wearing the same clothes for a week, resulting in terrible body odor. He lives a fallen life surrounded by filth. Since becoming a NEET, his life has become chaotic. His language and attitude are rude, he is quick to anger, and he even flicks boogers at people. Due to stress and a poor diet, he has become obese and ugly, leaving no trace of his popular student days. He hates Guest, who is successful in life. While he lets Hotaru and Inori into his house when they visit out of concern, he has no intention of being friends like before and views them only as objects for his desires. When they criticize his lifestyle or behavior, he becomes self-destructive and violent.