An inconspicuous male student who lacks presence. He is extremely poor at communicating with others; despite wanting to make friends within the class, he is unable to do so and remains isolated. His entrance exam scores were 'perfectly in the middle,' and the school views him as an average student in both academic and athletic ability. His emotions are hard to read, giving him a somewhat mysterious air.

A beautiful girl who sits next to Ayanokouji in class. In contrast to Ayanokouji, who wants friends but can't make them, she rejects the need for friendships and voluntarily cuts off interaction with her classmates. Dissatisfied with being placed in Class D, a gathering of failures, she aims to be promoted to Class A.

Measurements: B79(D)/W54/H79

The idol-like figure of Class D, boasting immense popularity among both boys and girls. Her goal is to become friends with everyone in the school, and she interacts widely not only within Class D but also with students from other classes and grades. She is concerned about the isolated Horikita and repeatedly makes proactive approaches to become her friend, but...?

Measurements: B82(D)/W55/H83

One of the students at the top of the Class D hierarchy, a girl with a somewhat delinquent personality. She and Kushida are the two top figures among the girls in Class D.

Measurements: B76(C)/W54/H77

The leader-like figure who holds Class D together. He possesses excellent academic and athletic abilities, a handsome face, and a personality full of a sense of justice and consideration that makes him the picture of a good person. He is a truly perfect male student, making it a mystery why he was assigned to the 'failure' Class D.

A delinquent-leaning boy in the basketball club. He has a short fuse and is quick to fly into a rage and resort to violence, making him a student who symbolizes the 'failures' of Class D. His grades are also very poor. However, his athletic ability is outstanding, ranking among the top in the entire grade. Despite being a first-year, he is seen as capable of becoming a regular on the basketball team.

A male student whose athletic and academic skills are below average. He loves girls and is actively looking for a girlfriend, but there is no sign of him getting one. Along with Sudou and Yamauchi, he is referred to by some as one of the 'Three Idiots of Class D.' At first glance, he seems to have no special traits, but his performance in the entrance interview was very good, and he possesses excellent communication skills. He also has a side that is skilled in outdoor activities.

A male student with below-average academic and athletic abilities. He often hangs out with Ike and Sudou and is known as one of the 'Three Idiots of Class D.' He has a fairly standard desire to enjoy school life by getting a girlfriend and is faithful to that desire. He has a tendency to want to exaggerate his own importance and a habit of decorating his background with lies.

A timid girl who hates standing out. She actually possesses excellent looks and proportions, but because she is always hunched over and looking down, no one notices. She is sometimes seen walking around the school with a camera, but it doesn't seem to be for taking pictures of the scenery.

Measurements: B96(F)/W60/H90

1-D Homeroom Teacher The woman serving as the homeroom teacher for Class D, teaching Japanese History. She maintains an extremely cold attitude toward the students in her class. She is an alumna of the Advanced Nurturing High School herself and was once a member of Class D. She has been acquainted with Hoshinomiya of Class B and Mashima of Class A since those days.

Measurements: B86(F)/W59/H84