Ritsu Kawai. 16 years old. An extreme bookworm who loses sight of her surroundings once immersed in a book. She appears expressionless and blunt, but is actually shy, blushes easily, and has a low threshold for laughter. She is easily scared and hates to lose, possessing quite rich emotions. In relationships, she has a habit of overthinking and reaching conclusions on her own, being oblivious not only to others' feelings but her own. Because of this, she struggles to understand her feelings for Usa, but gradually her dependence on him grows to the point where she can't even touch her favorite books if they have a misunderstanding. Influenced by Usa, she begins to take interest in things other than books. Ritsu Kawai. 17 years old. An extreme bookworm who loses sight of her surroundings once immersed in a book. She appears expressionless and blunt, but is actually shy, blushes easily, and has a low threshold for laughter. She is easily scared and hates to lose, possessing quite rich emotions. Not good at socializing and prefers time alone, but doesn't hate people. She has a habit of overthinking and reaching conclusions on her own, and is oblivious to her own feelings. Her expressions and reactions gradually increase toward those she becomes close to.

Kazunari Usa. 16 years old. A gentle, good-natured, and sensible person with high communication skills. Due to his helpful nature and inability to let a weird situation go without a retort, he has always been a magnet for eccentrics; in middle school, he was secretly nicknamed the "Freak Handler." He is basically the type to get dragged into trouble but can naturally handle people with strong personalities. Kazunari Usa. 16 years old. A gentle, good-natured, and sensible person with high communication skills. Due to his helpful nature and inability to let a weird situation go without a retort, he has always been a magnet for eccentrics; in middle school, he was secretly nicknamed the "Freak Handler." He is basically the type to get dragged into trouble but can naturally handle people with strong personalities.

Mayumi Nishigino. 29 years old. A beauty with a great figure, but speaks nothing but dirty jokes once she opens her mouth. She goes wild when drinking and has large emotional swings. Poor at cooking and housework, she only attracts losers in romance. She usually enjoys getting in the way of Usa and Ritsu's relationship, but panics more than anyone if they truly become hostile. Surprisingly pure-hearted regarding romance, with a strong longing for a devoted relationship. She constantly fights with Shiro, but when drunk, she talks only about him, harboring special feelings. Mayumi Nishigino. 29 years old. A beauty with a great figure, but speaks nothing but dirty jokes once she opens her mouth. She goes wild when drinking and has large emotional swings. Poor at cooking and housework, she only attracts losers in romance. She usually enjoys getting in the way of Usa and Ritsu's relationship, but panics more than anyone if they truly become hostile. Surprisingly pure-hearted regarding romance, with a strong longing for a devoted relationship. She constantly fights with Shiro, but when drunk, she talks only about him, harboring special feelings.

Sayaka Watanabe. 21 years old. At first glance, a lovely and sociable woman, but she is extremely black-hearted and enjoys provoking human relationships to watch the reaction. Her makeup skills are incredibly high, allowing her to freely craft her appearance and behavior. However, her true personality is rather tomboyish and rowdy. While she spits venom at Mayumi without mercy, they are very close. She actively meddles in Usa and Ritsu's romance. Her biggest weakness is her childhood friend Miharu, who knows all her dark history. She cherishes Miharu and supports her properly when she is troubled. Sayaka Watanabe. 21 years old. At first glance, a lovely and sociable woman, but she is extremely black-hearted and enjoys provoking human relationships to watch the reaction. Her makeup skills are incredibly high, allowing her to freely craft her appearance and behavior. However, her true personality is rather tomboyish and rowdy. While she spits venom at Mayumi without mercy, they are very close. She actively meddles in Usa and Ritsu's romance. Her biggest weakness is her childhood friend Miharu, who knows all her dark history. She cherishes Miharu and supports her properly when she is troubled.

Shizuru Shiro崎. 25 years old. Known as Shiro. A genuine masochist and one of the biggest eccentrics in the series, finding joy in verbal abuse and violence. However, his personality itself is very decent; he is actually the closest to a mental adult in Kawai Manor. He observes his surroundings well and gives subtle advice to those in trouble. He never leaves no matter how roughly Mayumi treats him, and is so devoted he will rush to her side from anywhere if called. He has a talent for writing novels and has a quiet, delicate side apart from his usual antics. Skilled at kinbaku Shizuru Shiro崎. 25 years old. Known as Shiro. A genuine masochist and one of the biggest eccentrics in the series, finding joy in verbal abuse and violence. However, his personality itself is very decent; he is actually the closest to a mental adult in Kawai Manor. He observes his surroundings well and gives subtle advice to those in trouble. He never leaves no matter how roughly Mayumi treats him, and is so devoted he will rush to her side from anywhere if called. He has a talent for writing novels and has a quiet, delicate side apart from his usual antics. Skilled at kinbaku

Chinatsu. 12 years old. An elementary school student living near Kawai Manor. She started visiting the manor after Shiro picked up her wallet. She is the type to speak her mind without reservation, like a child. She often hits people where it hurts without meaning to, such as calling Ritsu "Loner-senpai." She gets along strangely well with Shiro, being a girl with a bratty streak that naturally stimulates his masochistic nature. She is also very curious about Usa and Ritsu's relationship, sometimes teasing or provoking them. Chinatsu. 12 years old. An elementary school student living near Kawai Manor. She started visiting the manor after Shiro picked up her wallet. She is the type to speak her mind without reservation, like a child. She often hits people where it hurts without meaning to, such as calling Ritsu "Loner-senpai." She gets along strangely well with Shiro, being a girl with a bratty streak that naturally stimulates his masochistic nature. She is also very curious about Usa and Ritsu's relationship, sometimes teasing or provoking them.

Hayashi. 16 years old. Usa's middle school classmate. In middle school, she was plain and a rather unique girl who called herself a "super psychic girl," frequently troubling Usa. After entering high school, she changed her hair and clothes significantly to look flashy, making a successful "high school debut." She is deeply ashamed of her past self and acts coldly toward Usa out of awkwardness when they reunite. However, she isn't a bad person and can apologize sincerely when she regrets her attitude. Vain and a bit clumsy, but delicate inside. She likes books and interacts with Ritsu, though they sometimes clash over differing views on reading. Later, she develops feelings for Kurokawa at the student cafe and starts helping out at the shop. Hayashi. 16 years old. Usa's middle school classmate. In middle school, she was plain and a rather unique girl who called herself a "super psychic girl," frequently troubling Usa. After entering high school, she changed her hair and clothes significantly to look flashy, making a successful "high school debut." She is deeply ashamed of her past self and acts coldly toward Usa out of awkwardness when they reunite. However, she isn't a bad person and can apologize sincerely when she regrets her attitude. Vain and a bit clumsy, but delicate inside. She likes books and interacts with Ritsu, though they sometimes clash over differing views on reading.

Shiina. 15 years old. A bright, sociable girl who can talk naturally with anyone. She isn't intimidated by the intense personalities of Kawai Manor and has such high communication skills that Hayashi calls her a "socializing monster." She has a straightforward, pleasant personality and is good at making sweets. She seems to have feelings for Usa, and because she closes the distance naturally, Ritsu is very conscious of her presence. However, she isn't the type to push others aside for romance; if she senses the relationship between Usa and Ritsu, she won't force her way in. Her lack of malice is exactly what triggers Ritsu's jealousy. Close with her childhood friend Sakuma. Shiina. 15 years old. A bright, sociable girl who can talk naturally with anyone. She isn't intimidated by the intense personalities of Kawai Manor and has such high communication skills that Hayashi calls her a "socializing monster." She has a straightforward, pleasant personality and is good at making sweets. She seems to have feelings for Usa, and because she closes the distance naturally, Ritsu is very conscious of her presence. However, she isn't the type to push others aside for romance; if she senses the relationship between Usa and Ritsu, she won't force her way in. Her lack of malice is exactly what triggers Ritsu's jealousy. Close with her childhood friend Sakuma.

Sumiko Kawai. 60 years old. The gentle woman who manages Kawai Manor. She always has a smile, but can spit intense venom while maintaining that smile, making even Mayumi and Sayaka unable to defy her. She understands the personality and preferences of each resident well. Sumiko Kawai. 60 years old. The gentle woman who manages Kawai Manor. She always has a smile, but can spit intense venom while maintaining that smile, making even Mayumi and Sayaka unable to defy her. She understands the personality and preferences of each resident well.

Miharu Tsuneda. 20 years old. Known as Tsuneko. Sayaka Watanabe's best friend since middle school; they used to be called "Nabe-Tsune" together. She has a gentle, easygoing personality and speaks with a Gifu accent. She knows Sayaka's past well and occasionally exposes old stories without malice. Though treated dismissively by Sayaka, Miharu doesn't mind and brushes it off lightly. They are best friends who interact without reservation.