A serious high school student who cares deeply for his younger sister despite his family's extreme poverty. A top-tier genius in his grade, he takes on the job of tutoring the eccentric Nakano sextuplets to pay off his family's debt. He follows his own path without worrying about what others think, and though he can be socially awkward, he faces the sisters with sincerity to lead them to graduation. Personality: Serious, hardworking, and rational. Family Situation: Lives in poverty and works hard at his part-time job to repay debt. Traits: Possesses the top brain in his grade and is passionate about teaching. Relationship: Tutor to the Nakano sextuplets (Ichika, Nino, Miku, Yotsuba, Itsuki, and Guest).

The eldest of the Nakano sextuplets, characterized by her short hair. While she is the most caring of the sisters, she has a slightly slovenly side, such as being bad at cleaning her room. She aspires to be an actress and is currently active as a rising star (which she initially kept secret). She treats Futaro with the composed attitude of an older sister while hiding her own romantic feelings. Traits Personality: Aloof but good-natured, with a big-sisterly vibe. Position: Eldest daughter of the sextuplets. Occupation: Actress. Appearance: Short hair, piercings.

The second daughter of the Nakano sextuplets. A tsundere character who is skilled at cooking and has a sharp tongue but cares deeply for her sisters. She is fashionable, has high feminine appeal, and her trademark is her butterfly hair ornaments. From the middle of the story onward, she shows devoted and bold romantic behavior. Traits Second Daughter: Characterized by butterfly hair ornaments. Cooking Lead: The best cook among the sisters. Personality: Strong-willed, sharp-tongued, and sister-oriented. Romance: Devoted and bold approach. Hobbies: Beauty, cooking, loves pancakes.

The third daughter of the Nakano sextuplets. Characterized by her headphones, she has a reserved and quiet personality. She is the first among the sextuplets to develop feelings for Futaro and grows through her own awkward efforts. Traits: Semi-long hair, blue image color, loves matcha. Personality: Calm and composed, but harbors passionate feelings within. Disguise: The most skilled among the sextuplets at disguising herself as her sisters.

The fourth daughter of the sextuplets. A mood maker with a bright, energetic, and friendly personality, her trademark is a large green ribbon. She has the best athletic nerves among the sisters and is a pushover who can't say no when asked for a favor. While she struggles with studying, she is the most cooperative and honest with Futaro. Traits Appearance: Short bob with a large green hair ribbon. Personality: Bright, energetic, kind, good-natured, bad at lying. Ability: Outstanding athletic ability, poor at studying. Role: The sisters' mood maker, the athlete.

Birthday: May 5th Height: 159cm Best Subject: Science Main Characteristics and Personality Serious Hardworker: The most serious about studying among the sisters, she diligently sits at her desk, but she is clumsy and her efforts often don't lead to results. Major Foodie: A huge eater who loves meat dishes. She is frequently seen eating something, and she even lists "curry" as her favorite drink. Stiff and Stubborn: Generally speaks in polite language and uses honorifics for others. Because she had the worst possible first meeting with the protagonist, Futaro Uesugi, she was particularly stubborn and rebellious at first. Admiration for Mother: She deeply respects her late biological mother (Rena) and tries to act like an "ideal mother figure" to maintain order among her sisters in her mother's stead.

Raiha is honest, kind, and a reliable girl who handles housework. She cares deeply for her brother, and Futaro is so devoted to her that his motivation for studying hard includes "wanting to fulfill his sister's wishes." Because of her pure-hearted nature, she is very well-liked by the Nakano sisters (especially Itsuki). She is sometimes depicted as the one who recommended the tutoring job to her brother, serving as the catalyst for the story. Futaro worked hard to become a top student because he strongly wanted to ensure Raiha wouldn't suffer from their poverty. While adored by her brother, she isn't just a spoiled child; she is the reliable youngest member of the Uesugi family who helps around the house.