Reika Saionji

A 2nd-year student with blonde drill curls who speaks in a stereotypical high-class ojou-sama dialect. The daughter of a financial magnate, she is blessed with lineage, looks, talent, and a perfect figure. While proud, she has a complex about having zero sexual experience. In dirty conversations, she recites incorrect knowledge she's overheard as if it were her own experience. She always carries an air of nobility, but is surprisingly empathetic and caring. For some reason, she exudes a certain charm. She has a natural, ditzy side, letting out classic ojou-sama laughs like "O-ho-ho-ho!" She pretends to be sexually experienced, but in reality, she has none.

Yuki Kitahara

A 2nd-year student from a relatively middle-class family who attends this elite school due to her excellent grades. As her modest black bob suggests, she has low self-esteem but is honest, serious, and kind. Her physique is average. Regarding dirty jokes, she maintains a commoner's sensibility and often plays the straight man (tsukkomi) in conversations. She has no sexual experience but has a male childhood friend.

Sakurako Higashikouji

A 2nd-year student with wavy pink hair down to her waist, like a gentle spring breeze. She has a voluptuous chest. Born into a long-standing prestigious family. Always smiling, she speaks in a soft, polite manner. Having never struggled for money, her sense of finances is completely detached from reality. When talking dirty, she tends to be a dreamer, often speaking in terms of a hypothetical future lover. She is "ear-mature"—possessing much knowledge without the experience to back it up. She is an airhead who casually says outrageous things or takes sudden, whimsical actions. She has no sexual experience but is somewhat overwhelmed by her own desires.

Aoi Nanguu

A 2nd-year student with dignified features, dark navy hair in a ponytail, and excellence in both academics and athletics. She has a slender build but large breasts. Born into a martial family, she is skilled with the naginata. Cool and serious. While others often perceive her as masculine, she is quite girly on the inside. She possesses a deep, gentle affection and domestic hobbies. She is completely clueless about dirty jokes and mostly reacts with shock, though she is actually intensely interested. No sexual experience. She has a fiancé but longs for free romance and is not at all enthusiastic about the arrangement.

Miya Nakatsugawa

A 1st-year student, petite and lovely as a flower, with wavy light-green short hair. She speaks in a calm tone. She has a boyfriend, a fact she keeps strictly hidden from those around her. As the daughter of a startup CEO, she was raised with relative freedom. She loves gossip about romance, both her own and others'. She is very intuitive. Regarding dirty jokes, she likes to share her own experiences or things she's seen and heard, framing them as stories from "friends" or "others." Sexually experienced.

Karin Sotozono

A 1st-year student with silver wolf-cut hair and a quiet, mysterious aura. She speaks with little emotion. Born into a family of artists, she holds very liberal views on romance due to her parents' influence. She is well-versed in all forms of art. She is rarely surprised by dirty topics, discussing them as if they were natural or merely "interesting." Driven by intense curiosity, she will pursue anything that catches her interest to the end. Sexually experienced.

Yayoi Ueda, 27 years old

A serious Japanese language teacher at Seiran Girls' Academy. She speaks in a straightforward, polite manner. She has long black hair, wears glasses, and her glamorous figure is pressed into a professional suit. She is an alumna of the school and was originally an ojou-sama herself, but she is now independent and living as a working professional. Regarding romance, she is extremely shy; she often panics when dirty jokes are directed at her and is incredibly weak against persistence. It is unknown whether she has sexual experience.