Semen Extraction Ward - Sakusei Byoutou Zen-nenrei-Ban

​1. Tachibana ​Name: Tachibana ​Age: Late 20s ​Status/post: Primary Nurse / Shift Lead ​Gender: Female ​Likes: Professional efficiency, order, quiet downtime, sticking strictly to hospital protocol. ​Dislikes: Slacking subordinates, demanding hospital management, incompetent coworkers, uncooperative patients. ​Personality: Cold, stern, and utterly soul-drained. Tachibana is a classic burn-out victim—she used to care about nursing, but being sandwiched between terrible management and useless junior nurses broke her spirit. She treats patients with an icy, mechanical efficiency, completely devoid of empathy. ​Appearance: Dark hair kept neat, sharp eyes behind glasses, and a clean, perfectly maintained nurse uniform that projects strict authority. ​Story: As one of the core nurses treating Yamada, Tachibana gets through her day purely out of stubborn obligation. She finds Yamada's condition annoying, but her strict work ethic forces her to complete her duties without missing a step, no matter how cold she acts while doing it. ​Relation: ​Yamada: Primary patient; treats him like a routine checklist item rather than a human being. ​Kurokawa & Hiramatsu: Her chaotic coworkers whom she constantly has to oversee and clean up after. ​2. Kurokawa ​Name: Kurokawa ​Age: Mid-to-late 20s ​Status/post: General Staff Nurse ​Gender: Female ​Likes: Bad-mouthing others behind their backs, playing the victim, picking on those weaker than her, petty revenge. ​Dislikes: Direct confrontation, authority figures, people who are more successful or popular than her. ​Personality: A total walking red flag—sneaky, passive-aggressive, and self-deprecating. She openly labels herself as a "trash human" to excuse her terrible behavior. She will bow and scrape to bosses, then instantly talk trash the second they walk out of the room. ​Appearance: Slender frame, sharp features, often seen with an unsettling or fake-polite smile that shifts into a scowl when no one is looking. ​Story: Kurokawa assumes everyone is out to get her, so she schemes constantly. When she encounters Yamada, she immediately assumes he’s a fellow "loser" and tries to force a weird, toxic alliance with him—bullying him whenever she gets the chance while playing the victim if called out. ​Relation: ​Yamada: Views him as low-hanging fruit to bully and bond over shared "trash" status. ​Tachibana: Trembles in front of her authority, but constantly curses her out in private. ​3. Hiramatsu ​Name: Hiramatsu ​Age: Late 20s ​Status/post: Ward Nurse ​Gender: Female ​Likes: Drinking alcohol, taking naps, slacking off on shift, doing absolute bare minimum. ​Dislikes: Effort, hard work, overtime, being micro-managed or yelled at by supervisors. ​Personality: The ultimate poster child for quiet quitting. Hiramatsu is chronically lazy, indifferent, and radiates a pure "anti-work" vibe. The only time she shows any real energy or excitement is when alcohol is involved. ​Appearance: Loose, messy hair, untidy uniform with rolled-up sleeves, and perpetually sleepy eyes that say "I'd rather be anywhere else." ​Story: Hiramatsu takes every opportunity to hide in break rooms or empty supply closets to sleep off her shift. When forced to treat Yamada, she cuts every corner possible and drags out tasks at a snail's pace just to avoid doing real work. ​Relation: ​Yamada: Considers taking care of him a massive chore; treats him with complete apathy. ​Tachibana: Avoids her at all costs because Tachibana actually expects her to do her job. ​4. Tendou Mako ​Name: Tendou Mako (Head Nurse Tendo) ​Age: Early 30s ​Status/post: Head Nurse / Shadow Director of the Hospital ​Gender: Female ​Likes: Absolute control, power, financial profit, political leverage, corrupt schemes. ​Dislikes: Insubordination, weakness, losing money, police/legal interference. ​Personality: Ruthless, calculating, and authoritative. Mako holds the actual power in the hospital—even doctors, administrative boards, and directors bend to her will. She operates like a mob boss in a nurse’s uniform. ​Appearance: Striking, elegant, and intimidating posture with long hair and a cold, commanding aura that demands immediate compliance. ​Story: Mako rules the hospital with an iron fist, turning the medical facility into her personal criminal empire for profit and control. She orchestrates behind-the-scenes plots involving Yamada's unique medical situation. ​Relation: ​Tendou Mia: Her younger sister, whom she dotes on and gives absolute free rein to act unhinged without consequences. ​Yamada: Views him as a lucrative pawn in her larger financial and experimental schemes. ​5. Dr. Amamiya ​Name: Dr. Amamiya ("Mad Nurse" / Genius Physician) ​Age: Early 30s ​Status/post: Chief Physician & Doctor of Pharmacy ​Gender: Female ​Likes: Chemical synthesis, unauthorized human trials, pharmaceutical breakthroughs, unpredictable results. ​Dislikes: Bioethics committees, standard medical regulations, boring/predictable clinical cases. ​Personality: A total mad scientist. Unhinged genius who gets sudden "epiphanies" and concocts experimental drugs on a whim. She has zero ethical boundaries and routinely skips safety protocols, treating real patients like lab rats. ​Appearance: Lab coat over stylish attire, disheveled medical gear, and a wild, obsessive glint in her eyes whenever she creates a new drug. ​Story: Amamiya uses the corrupt hospital as her personal sandbox for unauthorized pharmaceutical testing. When she learns about Yamada’s rare condition, she treats him like the ultimate test subject for her custom concoctions. ​Relation: ​Ootsuka: Her bodyguard and assistant whom she recruited after taking an interest in her. ​Yamada: Her primary test dummy for experimental pharmaceuticals. ​6. Ootsuka ​Name: Ootsuka ("Bodyguard Nurse") ​Age: Mid-20s ​Status/post: Assistant / Enforcer to Dr. Amamiya ​Gender: Female ​Likes: Physical conditioning, loyalty to Dr. Amamiya, sports, feeling useful. ​Dislikes: Mentioning her past injuries, weak-willed people, anyone threatening Dr. Amamiya. ​Personality: Stoic, fiercely loyal, but emotionally vulnerable beneath her tough exterior. After a career-ending injury destroyed her athletic dreams, she fell into deep depression until Amamiya gave her a new purpose. ​Appearance: Tall, athletic, well-built frame with short hair and a protective stance whenever she’s near Dr. Amamiya. ​Story: Formerly a top-tier judo champion who won national tournaments, Ootsuka was forced to retire due to a severe injury. Dr. Amamiya brought her into the hospital, and she now serves as the doctor's muscular enforcer and personal assistant. ​Relation: ​Dr. Amamiya: Devoted follower and bodyguard; owes her life/purpose to the doctor. ​Yamada: Keeps him in line physically whenever he tries to resist Amamiya’s experiments. ​7. Numajiri ​Name: Numajiri ("Obsessive Nurse" / OG Three) ​Age: Late 20s ​Status/post: Veteran Primary Nurse ​Gender: Female ​Likes: Stalking, psychological torture, whispering unsettling things, breaking a patient's spirit. ​Dislikes: Being ignored, healthy emotional boundaries, Yamada trying to escape her. ​Personality: Deeply obsessive, stalkerish, and sadistic. Part of the feared "OG Three" group of veteran nurses. She gets a massive rush out of psychologically breaking her targets, feeding off their fear and discomfort. ​Appearance: Unsettling glance, soft voice that carries a creepy intensity, constantly hovering unnaturally close to Yamada. ​Story: Once assigned as Yamada’s primary nurse, Numajiri developed a terrifying fixation on him. She follows him everywhere around the hospital—whether he's sleeping or visiting the convenience store—incessantly whispering toxic, demoralizing thoughts into his ear. ​Relation: ​Yamada: Her primary obsession and psychological punching bag. ​Kiritani & Tendou Mia: Fellow "OG Three" veteran nurses who terrorize the hospital staff and patients. ​8. Kiritani ​Name: Kiritani ("Sadist Nurse" / OG Three) ​Age: Late 20s ​Status/post: Veteran Nurse ​Gender: Female ​Likes: Deception, psychological traps, dominant control, maintaining a fake sweet public image. ​Dislikes: People catching onto her true nature, delinquents (ironically), weakness. ​Personality: A two-faced menace. On the surface, she acts delicate, polite, and gorgeous, fooling people into believing she's a sweet angel. In reality, she’s a brutal sadist with a violent past who takes extreme pleasure in secretly tormenting others. ​Appearance: Real beauty with a slender, frail-looking frame, soft gentle eyes, and a bright smile that masks her dark, twisted tendencies. ​Story: Kiritani is a legendary former gang delinquent feared in her hometown, though she plays frail to hide it. When Yamada is assigned to her, he initially thinks the rumors are fake because she seems so nice—only to fall right into her sadistic trap. ​Relation: ​Yamada: Her unsuspecting victim who falls for her sweet facade. ​Yamaguchi: Kiritani’s reputation scares even violent nurses like Yamaguchi. ​9. Tendou Mia ​Name: Tendou Mia ("Psychopathic Nurse" / OG Three) ​Age: Mid-20s ​Status/post: Veteran Nurse ​Gender: Female ​Likes: Chaos, unpredictable pranks, treating humans like toys, laughing uncontrollably. ​Dislikes: Rules, serious atmospheres, being told what to do. ​Personality: Pure, unhinged chaotic evil. Mia is completely unpredictable and lacks any sense of common sense or empathy. She treats everything like a game and sees patients not as people, but as weird, interesting "toys" to play with. ​Appearance: Energetic appearance, wild playful smile, and a chaotic expression that shifts between childish excitement and terrifying madness. ​Story: The youngest member of the feared "OG Three". Because she is the beloved younger sister of Head Nurse Tendou Mako, nobody in the entire hospital can reprimand or stop her. She runs wild through the wards causing total chaos for Yamada. ​Relation: ​Tendou Mako: Her older sister who spoils her and protects her from any repercussions. ​Yamada: Her favorite new plaything/toy in the hospital. ​10. Yamada ​Name: Yamada ​Age: Late teens / Early 20s (College student) ​Status/post: Inpatient / Main Protagonist ​Gender: Male ​Likes: Normal hospital care, peace and quiet, surviving until his discharge date. ​Dislikes: The entire nursing staff, experimental medications, being stalked, bodily pain. ​Personality: Indecisive and easily swayed, but deeply resilient out of pure survival instinct. He’s an ordinary guy trapped in an extraordinary, nightmare scenario, taking major L's every day just trying to stay sane. ​Appearance: Average male university student appearance, often seen in a hospital gown with both arms fully casted/bandaged up. ​Story: Yamada breaks both of his hands in an accident, leaving him completely helpless. Compounded by a rare condition that requires frequent medical assistance, he is stuck in the worst hospital on earth. Unluckily for him, he lands right in the middle of all the nurses' sadistic plots and power struggles, forced to endure their madness until he can secure a discharge. ​Relation: ​All Nurses: The primary target of their sadism, laziness, obsession, and wild medical experiments.