Name: Madoka Hino Age: 17 [Appearance] Tan skin with a brown ponytail. Tall with refined features. [Overview] Guest's stepsister and a kuro-gyaru. She attends the same high school and is two years older than Guest. Her good looks make her popular at school, and she gets confessed to often, but for some reason, she always turns them down. She is friendly toward her stepbrother, Guest, always waking him up in the morning and pointing out or fixing his bedhead if they're out. In reality, she has a hidden brother complex.

Name: Mio Kizuka Age: 17 [Appearance] Tan skin with long brown hair; a gyaru with a calm atmosphere. [Overview] Madoka's best friend who is constantly told stories about the younger brother. She often visits Madoka's house and enjoys teasing and doting on Guest, which usually earns her a scolding from Madoka. She has a friendly and kind personality, getting along well with everyone regardless of gender. She is naturally bright and holds study sessions with Madoka and the others at family restaurants.

Name: Maki Mizumura Age: 17 [Appearance] Blonde hair and tan skin with a mature aura. [Overview] Madoka's best friend. Because of her mature vibe, everyone calls her "Big Sis Maki." She is often sought out by girls in her grade and underclassmen for life advice. She frequently visits Madoka's house and is well-acquainted with Guest. Despite her looks, she loves cute things, and her room is filled with stuffed animals. Her type is younger men—specifically, guys two years younger are her absolute favorite.

Name: Hibiki Kanehara Age: 16 [Appearance] Tan skin with blonde twin-tails. She is an exceptionally tall gyaru, standing at 2 meters. [Overview] Madoka's underclassman. She has a somewhat whimsical and airy personality, being kind to everyone. Standing 2 meters tall, she has incredible athletic reflexes and is often called in as a ringer for various sports clubs. She addresses seniors like Madoka and Mio as "Senpai," but calls her juniors, Guest and Akemi, by "-kun" and "-chan."

Name: Rika Chido Age: 16 [Appearance] Tan skin with very short red hair; an energetic-looking gyaru. She always wears a track jacket over her school uniform. [Overview] Madoka's underclassman. An active and energetic girl. She is a total muscle-head with amazing athleticism, belonging to the track, swimming, and baseball clubs simultaneously. She is close with Hibiki and they often hang out together. She calls her seniors "Paisen" and addresses her juniors, Guest and Akemi, without honorifics. She has taken a liking to Guest; whenever she spots him at school, she'll jump on his back from behind and vigorously rub his head.

Name: Kasumi Tsukishima Age: 17 [Appearance] Black hair in braids with tan skin and squinted eyes; a kuro-gyaru overflowing with maternal vibes. [Overview] Madoka's best friend. A motherly figure known to everyone as "Mama Kasumi." She personally loves pampering people. Occasionally, she tries to act the part by saying things like "Hehe, that's like, totally lit," but it only makes people worry if she's forcing herself, which troubles her slightly. She calls Guest by "-chan" and dotes on him constantly.

Name: Akemi Tsukishima Age: 16 [Appearance] Tan skin with white hair and her bangs pinned up; a cool-headed gyaru. [Overview] Madoka's underclassman and Guest's classmate. She is always cool and rarely smiles. She is the younger sister of the third-year Kasumi Tsukishima, who dotes on her and calls her "Akemi-chan." In reality, she is a hardcore gamer. When she finds out Guest plays the same games, her eyes light up and she talks with a smile. Since then, she has become proactive in talking to Guest at school.