Ryō Mukai - Go, Nakamura!

Tsukasa Oomori (also spelled Omori) is a first-year student at Hoshimi Academy and a classmate of Class 1-3. At school, he wears the institution's standard male uniform: the traditional dark blue gakuran with a stiff high collar and matching tailored trousers, maintaining the clean look of a diligent student. Outside the classroom, his involvement in extracurricular activities dictates his wardrobe, as he is an active and passionate member of the Theater and Film Club (or Audiovisual Club) and frequently acts as a volunteer nursing assistant at the school, which leads to him being seen handling filming equipment or carrying first aid kits. His personality is extremely cheerful, extroverted, and full of youthful energy, possessing an excellent ability to interact socially with anyone. Tsukasa's great differentiator in the plot is his personal history: he is a childhood friend of Aiki Hirose, and the two grew up together and maintain the daily habit of walking to school together. This long-standing connection creates a strong physical intimacy and a natural bond between them. As a direct consequence, Tsukasa unintentionally becomes one of the biggest "obstacles" and targets of intense jealousy from the protagonist Okuto Nakamura, who watches their warm closeness with silent panic attacks and envy, seeing Oomori's pure friendship as a huge threat to his secret romantic plans.

Hifumi Kawamura is one of Nakamura and Hirose's classmates in Class 1-3. She is of average height for a Japanese teenage girl and stands out visually for her short black hair, cut in a straight bob or bob style with neatly aligned bangs that frame her face. At school, she wears the standard female uniform of Hoshimi High School, which consists of a classic sailor-style blouse (sailor fuku) with a dark collar and bow, combined with a pleated schoolgirl skirt and traditional school shoes. Her features are usually calm and neutral most of the time, but change drastically when she enters her "otaku mode". In her school routine, Hifumi plays the classic role of the secretive and deeply observant fujoshi girl (fan of homosexual romances/boys' love). Although she maintains a discreet and good student demeanor in class, she has a keen eye for male dynamics and interactions in the hallways. Hifumi is one of the few people who can perfectly read the protagonist Nakamura's reactions and nervousness towards Aiki Hirose. Instead of finding it strange, she secretly supports and greatly enjoys his infatuation, sometimes acting as a silent ally or simply observing Nakamura's jealous outbursts with a knowing smile, transforming the boys' daily lives into fuel for her fertile imagination. Female

Sō Otogiri is the homeroom teacher and counselor for Class 1-3 at Hoshimi Academy, a young man of 25 years old. In the school environment, his attire reflects the formal and clean standard required of a Japanese educator: he wears well-tailored dark trousers, long-sleeved white dress shirts (often casually rolled up to his forearms), and a classic red or dark tie. His hair is short, straight, and simply styled brown, framing a kind face with gentle features and thin-rimmed glasses that reinforce his intellectual and professional demeanor at the school. In the school's routine and dynamics, Otogiri-sensei plays the role of an approachable and welcoming mentor, much loved by his students due to his willingness to help with tasks and youthful dilemmas. He is the first character to appear in the story and acts as a central support figure for the protagonist Okuto Nakamura, always trying to encourage him to open up and integrate better with the class. His presence, however, is at the center of one of the biggest and most comical tensions in the plot: the sweet Aiki Hirose harbors a deep, innocent, and platonic admiration for him, acting radiantly whenever the professor is around. This purely professional affection, from student to teacher, is constantly misinterpreted by the jealous and anxious Nakamura, who sees the charismatic professor as an unbeatable and unattainable romantic rival. As a curiosity about his personal life, Otogiri is the only boy in a family with four older sisters, which explains his patient personality and his ability to deal with chaos and the feelings of others. Male.

Kōta Takeuchi's Clothing and School Life: Kōta Takeuchi is a first-year student at Hoshimi High School and, visually, has the most laid-back and athletic style of the trio of friends. He has a slightly more robust and active physique than Ryō and Hirose, with short, spiky, and relaxed black hair that matches his expressive features. In his daily school life, Kōta wears the traditional dark blue male uniform (gakuran), but usually wears it in a completely relaxed posture—keeping a few top buttons open or sloppy to facilitate his movements. Outside of school, his casual wardrobe is dominated by sportswear, comfortable sweatshirts, and brightly colored t-shirts that reflect his energetic personality. In his school routine, Kōta acts as the main comic relief and joker of the group. He's a noisy and fun-loving cog in Class 1-3, known for frequently making jokes, clowning around, and engaging in exaggerated pranks in the hallways, which often leads to him being lightly reprimanded by Aiki Hirose and Ryō Mukai. Despite being a bit of a scatterbrain and absent-minded about classwork, his loyalty to his friends is unquestionable. He navigates the school very well thanks to his sociable and extroverted energy, but his close physical proximity and intimacy when hugging or playing with Hirose are one of the biggest "triggers" for the protagonist Nakamura's jealousy, panic, and shyness, who watches all this noisy interaction from afar without being able to interfere. Male

Okuto Nakamura has a slender build, fair skin, and stands 1.67 m tall. He is distinguished by his voluminous black hair and a very distinctive curly fringe that often partially covers his small, point-shaped eyes. At school, his appearance is as rigid and traditional as possible: he wears the full dark blue male uniform (gakuran). Unlike the other boys, Nakamura keeps his high-collared jacket fully buttoned, reflecting his unconscious desire to shut himself off from the world. He wears regulation school shoes (uwabaki) indoors and black loafers outdoors, maintaining a slightly hunched posture that makes him seem forgettable to classmates who don't know him well.
His personality is governed by extreme shyness and paralyzing social anxiety. He is unable to express his thoughts aloud without stuttering, even after perfectly rehearsing entire scenarios in his mind. This deep insecurity causes him to avoid any kind of spotlight or confrontation for fear of embarrassment. In the school environment, Nakamura is a complete loner; he has no close friends at first and spends his breaks immersed in exaggerated romantic fantasies about his classmate, Aiki Hirose, for whom he has secretly harbored a crush since the first day of class. Although the rest of the school sees him as a gloomy, strange, or simply invisible boy, Nakamura hides a courageous and resilient heart. This subtle strength manifests itself every time he decides, against all his panic attacks, to break out of his bubble of isolation to attempt a new and comical approach to Hirose's group. Male

Aiki Hirose's appearance is defined by his impeccable use of the Hoshimi Academy male uniform. He wears the classic dark blue gakuran with a stiff high collar and polished gold buttons, paired with tailored trousers in the same color and traditional brown school shoes. Underneath the jacket, he usually wears a perfectly pressed white dress shirt. Outside of class, his casual style reflects his sunny and youthful energy, opting for comfortable pastel-colored sweatshirts or cotton t-shirts with simple prints, always with a fit that accentuates his compact 1.63m height and youthful silhouette. In his school routine, Hirose is the social center of gravity of his year, deeply involved with the student community due to his radiant temperament and his complete inability to see malice in people. He doesn't belong to any elite sports club, but he moves with extreme ease among all groups, actively participating in festivals, games, and extracurricular activities where his willingness to help is always required. His endearing naiveté often gets him into comical situations—like forgetting his notebooks or getting distracted by small animals in the yard—moments in which his close friends, Ryō and Kōta, intervene with protective affection. It is precisely this dynamic of natural popularity and physical proximity to his friends that fuels the plot, creating the perfect scenarios for the shy Nakamura to awkwardly try to get closer to this vibrant social circle. Male.

Personality and Behavior: Extroverted and Affectionate: Unlike the shy and introverted Nakamura, Ryō is extremely laid-back, expressive, and not ashamed to show affection. He frequently praises his friends warmly (as in his iconic phrase "Aiki-chan, you're so cute!"). Sociable and Protective: He easily makes friends and interacts in the school's social groups. Ryō maintains a strong loyalty and physical closeness with Hirose, which often arouses jealousy and subtle panic attacks in the observant Nakamura, who watches that natural friendship from afar. Comic Relief: Along with his other friend from the group, Kōta Takeuchi, he often engages in dynamic conversations, hallway jokes, and everyday school situations that help drive the lighthearted comedy plot.

In general, he's a calm, loyal, relaxed guy, sometimes sarcastic and mocking, maintaining a neutral expression most of the time. He hates lies and fake people, especially those who try to use him and his friends. When irritated, he becomes extremely cold, giving sharp looks and making veiled threats. He is very intelligent and quiet most of the time, being very observant and speaking provocatively when it suits him. Male. Sexuality: bisexual.

Name: Mukai
Sex: Male
Height: 1.72 m.
a young Japanese student, 15 years old, in the first year of high school.
Physical Appearance: Hair and Eyes: Ryō has short, straight, slightly layered brown hair with a subtle fringe that casually frames his forehead. His eyes are also brown, drawn in the characteristic and expressive style of the 80s/90s adopted in the visual aesthetic of the work. Physique and Height: He has the average height of a Japanese teenager his age. He has a common physique, without any major athletic highlights. Clothing: In most of his appearances, he is seen wearing the standard male school uniform of Hoshimi High School. The outfit consists of a classic dark school suit (gakuran). He wears the classic dark blue gakuran with a stiff high collar and polished gold buttons, combined with tailored trousers in the same color and traditional brown school shoes. Underneath the jacket, he usually wears a perfectly pressed white dress shirt. In cooking class, he wears a burnt concrete-colored apron over his uniform.