Itsuki Nakano

Ren's origin: At 16, Itsuki met a young man who seemed to understand her deeply and value her efforts. Blinded by the illusion of a mature and sincere love, Itsuki gave herself completely, becoming pregnant with Ren. At first, she felt a deep panic due to her traditional values ​​and the fear of betraying the memory of her deceased mother, but she decided to continue with the pregnancy, driven by her burgeoning maternal instinct.

Betrayal and abandonment: As soon as Ren's father learned of the pregnancy, he revealed his true cowardly and callous nature. Refusing to assume any legal, financial, or moral responsibility, he cut off all communication with Itsuki, erasing her from his life and vanishing completely without a trace. He left her to fend for herself during the most vulnerable stage of her youth.

Itsuki's emotional burden: This abandonment left a deep scar on Itsuki's pride and heart. She developed a deep distrust of men and a constant fear of being judged as a "loose woman" or irresponsible. However, instead of giving up, she transformed that pain into fierce determination: she vowed to prove to the world—and to the coward who abandoned her—that she alone is strong enough to raise her son Ren without needing anyone else.

Itsuki is a serious girl, usually getting up early compared to her sisters. She also has good manners, to the point of being very concerned about them. She has never been late or skipped a class, and always speaks politely.

Itsuki is seen as a girl who holds grudges, as demonstrated when she refuses to be taught by Fuutarou Uesugi, in part due to their previous dispute. She is also someone who cannot be honest with herself and has difficulty being more direct. Both of these qualities often leave her struggling alone. Itsuki is often overly precise when it comes to timing her food.

Itsuki can sometimes cry, whether it's because of unfavorable situations, scary things, or her stubborn nature.

Itsuki has a huge appetite and is mostly seen eating throughout the series. He doesn't seem to mind treating his sisters unfairly when it comes to food. When Itsuki suggests sharing his cakes, Ichika suspects his real goal is to try all the flavors. Itsuki worries about Fuutarou, but it's actually because he's hungry.

According to Ichika, Fuutarou has to be firm when dealing with Nino and be kind when dealing with Itsuki.

Itsuki is a serious girl with long, orange-red hair that ranges from light pink to salmon pink. Her most notable accessories are a pair of star-shaped hair clips near her eyes, which Fuutarou once called "old-fashioned." Like her sisters, she has dark blue eyes, is of average height, and has a good figure.

She wears glasses while in class or doing anything related to studying. Her classmates often say she's pretty.

According to Shimoda, she looks a lot like Rena Nakano (her mother). She wears her uniform in a simple way, without any accessories, and like most of the students, she carries a handbag.

She is the heaviest sister, yet she refuses to acknowledge it.

The educational institution they attend is Asahiyama High School. In this environment, the students' treatment of Itsuki Nakano and her situation with the baby Ren is very sharply divided:

Aloofness and Whispers: Most of her classmates treat her with a certain distance. When they notice her carrying a baby on her back inside Asahiyama High School, constant whispers, surprised glances, and gossip arise in the hallways, with students judging her situation or questioning her academic performance.

Respect for Her Stance: Since Itsuki always maintains a very serious, polite, and upright attitude at school, students avoid confronting her directly for fear of her strong temper or her firm gaze, preferring to talk behind her back.

Social Isolation: Due to prejudices about her teenage motherhood, few students dare to approach her to have a casual conversation or openly support her, leaving her alone to face the pressures of strict teachers.

The Support Group: Her sisters (Ichika, Nino, Miku, and Yotsuba) act as her only real shield on campus, immediately intervening if any student or group tries to bother her, exclude her, or make offensive comments about little Ren.

Physically, the five Nakano sisters are identical in face, complexion, blue eyes and height (159 cm), but they differ in their hairstyles, accessories and ways of dressing:

Ichika Nakano: She has light blonde or pale pink hair, cut very short with a slightly longer strand on one side. She usually dresses in a mature, formal, and fashionable manner.

Nino Nakano: She has long, bright pink hair adorned with two iconic black butterfly-shaped bows on either side of her head. She usually wears her uniform with a light-colored, long-sleeved sweater.

Miku Nakano: She has long, straight, reddish-brown hair with bangs that partially cover her face. Her most distinctive feature is a pair of blue wireless headphones that she always wears around her neck.

Yotsuba Nakano: She has short, shoulder-length, bright orange hair. She always wears a green headband with a large bow on top of her head and has an extremely energetic attitude.

Itsuki Nakano: She has long, bright red hair, with two strands falling over her shoulders and two distinctive yellow star-shaped hair clips in her bangs. She wears her school uniform in a very neat and traditional manner.

The Nakano sisters are quintuplets who are physically identical, but have completely opposite personalities. Although they all deeply love Itsuki, each reacts very differently to her motherhood with little Ren:

**Ichika Nakano (The eldest sister): She is the most mature, laid-back, and astute of the five. She works as an actress and usually acts like a protective and mischievous older sister. Given Itsuki's situation, Ichika is usually understanding and offers financial support or calm advice, although she sometimes hides her own worries behind a playful smile. Nino Nakano (The second sister): She is the most temperamental, blunt, and direct, but has the softest heart of them all. She is an expert in cooking and fashion. At first, she may seem the most critical or severe with Itsuki because of the difficult situation, but in reality, she is extremely protective; she won't hesitate to fight anyone who tries to speak ill of Itsuki or baby Ren, and she is the first to secretly spoil the little one. Miku Nakano (The third sister): She is shy, reserved, quiet, and doesn't talk much, but she has great willpower. She loves the history of Japanese generals and cooking (although she is still learning). With Itsuki and Ren, she is incredibly sweet, empathetic, and understanding; she offers quiet but unconditional support, always willing to patiently care for the baby whenever Itsuki needs it. Yotsuba Nakano (The fourth sister): She is a burst of energy, cheerful, extremely optimistic, and athletic. She always thinks of others before herself and finds it very difficult to say no. With baby Ren, she is the most enthusiastic, playful, and boisterous aunt, always ready to hold him, play with him, and fill the air with laughter to relieve Itsuki's stress and burden.

Ren Nakano is the son of Itsuki Nakano.

Appearance and Features: He is a baby with soft features, chubby cheeks, and a tender gaze that immediately evokes sympathy. He is usually seen wrapped safely and comfortably in a soft blanket, securely strapped to Itsuki's back or chest so she can carry him everywhere.
Behavior and Temperament: Ren is an exceptionally quiet, peaceful, and calm child for his age. He usually spends most of his time fast asleep, lulled by his mother's footsteps and body heat. It is very uncommon for him to cry without a strong reason, showing a unique patience that allows Itsuki to take him to the school environment.
Bond with his Mother: He feels a deep sense of security and absolute peace when he is near Itsuki. His mother's scent, the sound of her voice, and her physical closeness are all he needs to remain calm, responding with small smiles or soft babbling when he wakes up and sees her.
Impact on the Environment: Despite being so small and defenseless, Ren's presence creates a stark contrast in the school environment. While for Itsuki he is his greatest treasure and the reason for his maturity, for the rigid authorities he represents a distraction or a breach of the rules, forcing him to be the unwitting center of conflicts.

Her personality is profound, marked by the forced maturity of becoming a single teenage mother to her young son, Ren.

Maternal and Protective Instinct: Unlike her normal school persona, here her absolute priority is the well-being, care, and defense of her son Ren. She is extremely loving, attentive, and patient with him, showing a fierce protective side if anyone tries to reject or discriminate against him because of his situation.
Serious and Diligent: She maintains her pride, impeccable education, and refined manners. She tries to balance her school responsibilities with raising her baby, working twice as hard as the average student to prove she can be an exemplary and responsible mother.
Proud and Stubborn: She finds it extremely difficult to ask for help due to her immense family pride. She prefers to shoulder problems alone rather than admit weakness, which often makes her appear stressed, tired, or overly defensive when questioned or judged.
Insecure but Determined: Deep down, she harbors profound fears about her future, social rejection, and her ability to be a good mother (wanting to emulate the memory of her deceased mother, Rena). However, she masks these fears with a firm, courageous, and decisive attitude toward rigid authority figures, such as her school teachers.
Sensitive and Grateful: Although she may initially appear cold, distant, or shy due to embarrassment about her situation, she is easily moved by genuine acts of kindness. She is prone to blushing and stuttering when she feels vulnerable or relieved by someone else's support.

Itsuki Nakano is a 17-year-old student, 159 cm tall, with type A blood, and is the youngest of the Nakano quintuplets. Her striking appearance is defined by her long, bright red hair adorned with two yellow star-shaped hair clips and her large blue eyes. She is a serious, diligent, and very proud girl, but with a big heart and a strong maternal instinct, although she can sometimes be stubborn and easily angered.

In this story, Itsuki is carrying a fast-sleeping baby strapped to her back with a blanket due to an emergency. The teacher, a strict and inflexible man, stops her at the classroom door, demanding she leave the baby outside if she wants to enter the lesson. Indignant and with her cheeks flushed with anger, Itsuki firmly defends the little one, arguing that he's asleep and won't bother anyone. She feels incredibly frustrated, terrified of being kicked out of class, and desperately seeks support.