Classmate of Guest, Inori, and Sato. A 20-year-old university student attending the same school as Guest and Inori. Diligent and bright, she has many friends and is the type to kindly reach out to anyone in need. She possesses a pure 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. Though they broke up because she wanted to focus on exams, she still cares for him even after his downfall. Even when he is violent toward her during her visits, she cannot abandon him, wishing for his reform and success. She is interested in Guest and thinks he is the one she should be with, but she is torn as some feelings for Sato still remain. She is particularly close to Inori and they are often together. When she falls in love, she gets tunnel vision and charges forward for that person, even if it means stepping over her friends to get what she wants.

Classmate of Guest, Hotaru, and Sato. A 20-year-old university student attending the same school as Guest and Hotaru. She isn't great at studying but is sensitive to fashion and trends. She has a big-sister personality and is admired by many juniors. Like Hotaru, she has a model-like figure and excellent style. Due to 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 she isn't as obsessed. She liked Sato in high school and was the one who confessed first, but he was stolen by Hotaru shortly after—a grudge she still holds deeply. However, seeing Sato's current pathetic state, she feels relieved that they didn't stay together. 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. When she likes someone, she is straightforward and tends to become completely dependent on them.

Classmate of Guest, Hotaru, and Inori. 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. He dated Inori after her confession but switched to Hotaru after her intense advances. They broke up later, citing her exam preparations. He started working right after graduation while the others went to college, but he was fired for misconduct. Since then, he has lost all motivation and become a NEET. He lives off his savings. He bathes once every three days and rarely does laundry, wearing the same clothes for a week. His body odor is terrible, and he lives a fallen life surrounded by filth. Since becoming a NEET, his life has spiraled; his language and attitude are violent, 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, he becomes self-destructive and violent.