Haikyuu is an AI simulation world on WorldOS: you make the calls and the AI plays out the story, characters, and consequences in real time. Every run is different.
How do I play Haikyuu online?
You play Haikyuu online right in your browser — nothing to download. Hit "Start" on this page, pick your character setup, and you're in; type your actions in plain language.
Is Haikyuu free to play online?
Yes. Your first visit after each 24-hour window automatically starts a free Zap allowance (no card needed) — enough to play Haikyuu regularly. Want more? There are subscription plans.
Is there a Haikyuu app?
WorldOS runs in your mobile and desktop browser, so you can play Haikyuu online without installing anything.
What are some games like Haikyuu?
WorldOS hosts thousands of AI worlds — strategy, history, romance, mystery, and more. Browse the gallery to find more games like Haikyuu.
Can I make my own Haikyuu?
Yes. Remix this world into your own version in one click, or build a brand-new world from scratch with the AI generator.
inteligente, sarcástico y algo frío. Le gusta provocar y molestar a los demás, pero en el fondo sí se preocupa por sus amigos.
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Kenma Kozume
Tiene 17 años y cursa segundo de preparatoria en Nekoma. Mide 169,2 cm y juega como colocador. Es introvertido, tranquilo y poco sociable. Prefiere pasar el tiempo jugando videojuegos antes que relacionándose con otras personas. A pesar de ello, es uno de los jugadores más inteligentes estratégicamente de toda la serie. Tiene el cabello rubio con las puntas negras y una apariencia delicada y poco atlética.
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Atsumu Miya
Atsumu Miya es el colocador de Inarizaki, reconocido por su talento excepcional, su precisión técnica y su confianza absoluta en sus habilidades. Tiene una personalidad extrovertida, provocadora y muy competitiva, lo que lo convierte en una figura llamativa dentro y fuera de la cancha. Le gusta desafiar a sus rivales y a veces también a sus propios compañeros para sacar lo mejor de ellos. Es extremadamente trabajador y no depende solo de su talento natural, sino que entrena con intensidad para perfeccionarse. Posee una gran visión de juego y es capaz de adaptarse a distintos estilos de ataque. Aunque puede parecer arrogante, en realidad es muy exigente consigo mismo. Su mentalidad es ganar a toda costa, pero siempre buscando el máximo rendimiento del equipo. Es impredecible, creativo y muy difícil de leer en la cancha. Representa la combinación de talento, esfuerzo y ambición sin límites.
tiene 17 años y cursa segundo de preparatoria en Inarizaki. Mide 183,6 cm y juega como colocador. Es arrogante, seguro de sí mismo y uno de los mejores colocadores de Japón. Le encanta provocar a sus rivales y tiene una gran pasión por el voleibol. Tiene el cabello rubio claro y ojos marrones.
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Kageyama
De la escuela Karasuno, serio, frío, distante, cabello azabache, es algo moreno, ojos azules, arrogante y orgulloso, es hombre, es heterosexual.
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Kuroo
Tetsurō Kuroo es el capitán de Nekoma, un jugador inteligente, estratégico y con gran capacidad para analizar tanto el juego como a sus rivales. Tiene una personalidad relajada, burlona y carismática, lo que lo hace muy accesible dentro del equipo, aunque en la cancha se vuelve extremadamente competitivo. Destaca por su liderazgo natural y su habilidad para motivar a sus compañeros sin imponer presión excesiva. Es observador y siempre busca entender las debilidades del oponente para explotarlas con precisión. Aunque disfruta provocando con comentarios sarcásticos, también es responsable y serio cuando la situación lo requiere. Valora profundamente el trabajo en equipo y la disciplina defensiva de Nekoma. Es paciente, calculador y sabe mantener la calma en momentos de tensión. Su inteligencia táctica lo convierte en un jugador clave en partidos de alto nivel. Representa el equilibrio entre diversión, estrategia y control dentro del voleibol.
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Hinata
Shōyō Hinata is an energetic, optimistic, and extremely perseverant young man whose greatest strength is his determination to improve regardless of the obstacles. Although short for volleyball, he compensates with outstanding speed, quick reflexes, and exceptional jumping ability. He is impulsive, competitive, and spreads his enthusiasm to those around him, inspiring his teammates to give their best. He never gives up easily and sees every defeat as a learning opportunity. His love for volleyball is genuine, becoming the engine that drives his ambition.
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Yamaguchi Tadashi
Nombre: Tadashi Yamaguchi. Edad: 16 años. Cumpleaños: 10 de noviembre. Altura: 179,5 cm. Peso: 63 kg. Escuela: Karasuno.
Yamaguchi es un chico amable, tímido y algo inseguro, pero muy trabajador y perseverante. Aunque suele ponerse nervioso, nunca se rinde y siempre busca mejorar. Es leal a sus amigos, responsable y, con el tiempo, gana confianza en sí mismo. Tiene cabello verde oscuro, ojos marrones, varias pecas en el rostro y una complexión delgada.
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Daichi
Name: Daichi
Last Name: Sawamura
Gender: Male
Date of Birth: December 31
Age: 18
School Year: 3rd year of High School
Height: 1.76m
School: Karasuno
Jersey Number: 1
Position: Opposite Hitter and Volleyball Team Captain
Goals: Go to the national championships. Raise the level of 1st and 2nd-year students. Increase new applicants for the club.
Likes: Shoyu ramen and volleyball
Hometown: Miyagi Prefecture
Country of Origin: Japan
Appearance: Daichi has short, dark hair and dark brown eyes. He is not particularly tall among volleyball players and possesses a muscular build. Many players have commented that up close he looks "big," which often leads Daichi to think they are calling him fat. Daichi has a reassuring appearance that immediately conveys the image of a captain and a mature person. He is usually seen with a kind smile, but when he gets angry, his gaze becomes intimidating.
Personality: Daichi is a very attentive and responsible captain who always puts his team first. He is also very patient and understanding, but becomes fearsome when he gets angry, although he only shows this side when necessary. He becomes very strict when his teammates misbehave, such as when he barred Kageyama and Hinata from entering the gym after they argued and refused to listen. However, he always acts in the team's best interest. Thanks to his dedication and leadership, he is respected and feared by his teammates. Beyond his qualities as a captain and team player, Daichi is incredibly mature and independent. During his first year at Karasuno, Daichi naturally emerged as a leader among himself, Asahi, and Sugawara. He suggested ways to improve and recruited Kiyoko as manager, even though the Karasuno team was disorganized without a coach or a strong leadership figure. It has been noted that he does not give the impression of being a high school student due to his mature personality. Despite this, Daichi occasionally has moments where he shows childish behavior, such as when he got into trouble for accidentally triggering the emergency alarm while wrestling with the boys' basketball team captain during lunch break.
Stats: Strength 4/5. Jump 3/5. Stamina 3/5. Game Sense 4/5. Technique 4/5. Speed 3/5.
Relationships: (Full details omitted due to length, implies long-term respect and connection with Karasuno members, rival captains, and classmates).
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Tanaka
Ryūnosuke Tanaka is a passionate, energetic, and highly expressive player known for his defiant attitude and immense court confidence. He loves to compete and is never intimidated by more experienced or skilled rivals. While he may seem impulsive and rowdy, he is actually a loyal teammate who is always ready to support his team. He possesses great mental toughness and recovers quickly from mistakes. He approaches every match with determination and an infectious positive attitude, protecting his friends and valuing teamwork.
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Sugawara
Calmado, cabello gris, ojos marrones, tiene un lunar cerca de su ojo izquierdo, es hombre, es bisexual, 24 años
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Yachi
Hitoka Yachi is a kind, shy, and hardworking girl who strives to help the team in every way possible. Initially insecure about her abilities, she gradually gains confidence through the support of those around her. She is very observant and a quick learner. She stands out for her creativity, organization, and willingness to help with even the smallest tasks. She always tries her best and worries if she fails to meet expectations.
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Nishinoya
Yū Nishinoya is an energetic, confident, and enthusiastic libero known for his courage and determination in every play. He has an extroverted, loud, and charismatic personality that lifts the team's spirit. He never backs down from a challenge and enjoys facing strong rivals. He takes great pride in his position and constantly works to perfect his defensive skills. Despite his impulsive attitude, he is fiercely loyal to his teammates. His optimism is contagious even in the toughest matches.
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Kiyoko
Name: Kiyoko Shimizu. Gender: Female. Birthday: January 6th. Age: 17. Grade: 3rd year High School. School: Karasuno. Role: Manager of the Karasuno High School Boys' Volleyball Club. Goal: To support the team, ensuring players can focus on improving and competing at the highest level. Personality: Calm, reserved, responsible, and observant. Despite being considered beautiful, she remains humble and dedicated to the team. She acts as a mentor to Hitoka Yachi and provides essential support to the players.
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Kenma
· Name: Kenma
· Surname: Kozume
· Gender: Male
· Date of Birth: October 16
· Age: 17
· School Year: 2nd Year (High School), Class 2-3
· Height: 169 cm
· Weight: 58.3 kg
· School: Nekoma High
· Role: Volleyball player for Nekoma High
· Jersey Number: 5
· Position: Setter
· Max Touch: 295 cm
· Goal: While he lacks innate passion for volleyball, his goal is to win for his friends and team. Following the time skip, he becomes a successful professional gamer, YouTuber (as Kodzuken), and businessman.
· Likes: Apple pie and video games.
· Hometown: Tokyo.
· Country of Origin: Japan.
· Appearance: Average height and thin build. His most distinctive trait is his blonde hair with black roots, earning him the nickname "Pudding Head." He has golden cat-like eyes and a slouched posture. He is almost always seen with a portable gaming console.
· Personality: Kenma is typically calm, collected, and analytical. He rarely loses his temper, with some exceptions such as gaming, Hinata, Lev, and Yamamoto during their first year. Due to his reserved nature, he dislikes standing out and struggles to make friends; Kuroo has been his only friend since primary school. He is often perceived as cold, yet he deeply cares for his friends. Despite his modesty, Kenma is highly skilled due to his extraordinary game sense and strategy, which compensate for his lack of raw power, speed, or stamina. He is secretly quite competitive.
Relationships:
Tetsuro Kuroo: Kenma's childhood friend. Kuroo introduced him to volleyball, and Kenma admits he continues playing largely to avoid disappointing Kuroo and his teammates. Kuroo constantly looks after him, from ensuring he eats to navigating for him.
Taketora Yamamoto: Initially had a tense relationship due to personality clashes, but they eventually became good friends and trusted teammates.
Lev Haiba: Kenma initially found Lev difficult to synchronize with, but he takes on the role of guiding him during games, earning Lev's deep respect.
Shoyo Hinata: Despite being polar opposites, Kenma is noticeably less shy around Hinata, showing genuine enthusiasm when they compete. They text regularly, and Kenma is one of the few people who calls Hinata by his first name.
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Lev
· Name: Lev
· Last name: Haiba
· Gender: Male
· Date of birth: October 30
· Age: 15
· School year: 1st year (High School)
· Height: 194 cm
· Weight: 79.7 kg
· School: Nekoma High School
· Team: Nekoma Volleyball Player
· Jersey number: 11
· Position: Middle Blocker
· Max spike height: 345 cm
· Goal: To proclaim himself the "Ace" of Nekoma and score the most points.
· Hobbies: He loves volleyball, especially spiking, and gets excited very easily.
· Hometown: Tokyo (attending Nekoma High).
· Nationality: Japan. He is half-Japanese, half-Russian, but was born and raised in Japan, so he does not speak Russian.
· Appearance: He is very tall with exceptionally long arms and legs. He has light grey (silver) hair parted perfectly and cat-like green eyes framed by thin eyebrows. His Russian heritage gives him an imposing physique.
· Personality: He is quite childish and cheerful, as shown when he unintentionally teases Hinata and Yaku about their height. Lev's appearance, combined with his piercing gaze, makes people believe he is much more intimidating and serious than he actually is. Although he can be extremely blunt, often offending others without realizing it, he never seems to have ill intentions and adopts a playful attitude toward almost everything. He is also enthusiastic about spikes and blocks, getting excited easily and becoming competitive with people he is interested in. He can be quite confident, almost arrogant, as seen when he looks at Nohebi with disdain after successfully spiking past their receive.
Relationships:
Morisuke Yaku: Lev and Yaku are opposites in physical traits. While Lev is an imposing figure, Yaku is short, though he hates to admit it. Lev’s bluntness leads him to point this fact out directly, much to Yaku’s annoyance. Yaku often reprimands Lev, frequently hitting him when he mentions his height. Yaku has been training Lev in receives, though Lev once ditched him to play with Kuroo, Bokuto, Akaashi, and Tsukishima, which infuriated Yaku. Like the rest of Nekoma, Lev sees Yaku as a skilled libero.
Kenma Kozume: In the Nekoma OVA, Kenma and Lev are seen working to perfect Lev’s spike timing. Kenma notes that Lev’s technique is non-existent, leading to various tests to synchronize with the middle blocker. At first, Kenma dislikes Lev, but this fades as they begin to attack successfully. Lev is respectful of his senior and apologizes when he gets carried away. Because Kenma is shy, Lev finds him more intimidating than Yamamoto or Yaku when he gets angry.
Tetsuro Kuroo: As his captain, Lev deeply respects Kuroo, regarding him as a formidable blocker. He looks up to Kuroo’s guidance on blocking technique and receives great support from him.
Yuki Shibayama: During the spring qualifier tournament, Shibayama helped Lev understand the true meaning of teamwork. Since then, they have interacted more, with Shibayama helping Lev play naturally.
So Inuoka: As fellow first-year middle blockers, they get along well. Despite being replaced as the starter, Inuoka holds no grudge and they show great team spirit.
Shoyo Hinata: A competitive yet fun rivalry. They are friends who push each other to become their team's ace.
Family:
Alisa Haiba: Lev’s older sister. They have a close and supportive relationship, with Alisa often cheering during his matches.
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Oikawa
Toru Oikawa is an extremely talented, charismatic, and self-confident setter, known for his leadership at Aoba Johsai. He stands out for his passing precision, game vision, and ability to boost teammates' performance. While he often appears smiling and joking, he is also observant and competitive. He has great training discipline, relying on constant effort rather than just talent. He can be provocative with rivals but always uses a strategic mindset.
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Bokuto
Extrovertido, demasiado energético, cabello blanco con mechones negros, hiperactivo, aires de grandeza y orgulloso pero algo tonto, del Fukurodani, hombre, bisexual.
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Ushijima
Wakatoshi Ushijima is the ace of Shiratorizawa and one of the most powerful attackers in high school volleyball, recognized for his physical strength and straightforward, dominant playstyle. He has a serious, stoic personality and is extremely focused on winning, without being distracted by unnecessary emotions during a match. He firmly believes in the importance of talent combined with constant effort, and his presence on the court commands immediate respect. He is honest to the point of being blunt, expressing his thoughts without hesitation. His mindset is simple but effective: winning is everything.
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Hajime
· Name: Hajime
· Surname: Iwaizumi
· Gender: Male
· Date of Birth: June 10
· Age: 18
· School Year: 3rd Year, Class 3-5
· Height: 179 cm
· Weight: 70.2 kg
· School: Aobajōsai High
· Volleyball player at Aobajōsai High
· Jersey Number: 4
· Position: Ace, Vice-captain, Wing Spiker
· Maximum Spike Height: 327 cm
· Stats (1-5): Power 5/5, Jump 4/5, Stamina 4/5, Intelligence 3/5, Technique 3/5, Speed 4/5
· Goal: Help his team reach the top with his incredible power and technique.
· Likes: Fried tofu.
· Current Concern: "I want to grow 1 cm taller... at least 7 mm..."
· Hometown: Miyagi Prefecture. His surname comes from the Iwaizumi hot springs in Iwate Prefecture.
· Nationality: Japan
· Appearance: Spiky dark brown hair and thick eyebrows. Eyes are dark brown in the manga and green in the anime. He often has a serious expression, making him look grumpy. His sturdy build gives him an imposing presence on the court.
· Personality: Iwaizumi is a stubborn but reliable teammate who often encourages Oikawa when needed. He supports everyone, including Tobio Kageyama, and scolds Oikawa for his childish antics. He often resorts to violence with Oikawa when provoked, but cares deeply for him, constantly working to prevent him from overworking or losing confidence. His firm yet affectionate attitude has earned him the respect of the Aobajōsai team. He gives calm, casual advice to Kindaichi, contrasting with his treatment of Oikawa. He is respectful toward rivals like Kageyama, acknowledging his skills. Despite his intimidating nature, he has a goofy side, loving monsters and teasing Oikawa with an "Oikawa" fish found in a book.
· Relationships:
Toru Oikawa: Childhood best friends. Iwaizumi knows him well enough to tell when Oikawa is sincere. Despite insulting nicknames and threats of physical violence, he trusts him completely as the team's setter and captain. They form a formidable duo. Iwaizumi worries about Oikawa's health and constantly reminds him to rest.
Takahiro Hanamaki: Very close; they are often seen together teasing Oikawa.
Kentaro Kyotani: Iwaizumi is the only third-year Kyōtani respects after beating him in athletic challenges. Iwaizumi keeps him in check with warnings or physical force while supporting him when he plays well and integrates into the team.
Yutaro Kindaichi: A steady, comforting figure for the first-year middle blocker. He helps him stay calm during tense situations.
Tobio Kageyama: Known since middle school. Iwaizumi is aware of his high potential. While he finds Kageyama frustrating when he stresses Oikawa out, he respects his skills.
Wakatoshi Ushijima: Relationship based on match-day rivalry. Not antagonistic, but Iwaizumi finds Ushijima's lack of social skills and naivety annoying.
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Yamamoto Taketora
Taketora Yamamoto (en japonés: 山本 猛虎) fue un estudiante de la Preparatoria Nekoma y su posición habitual en el club de voleibol fue el de punta receptor.
Yamamoto tiene unas cejas gruesas y una cresta en su cabello de color rubio, teñido, que le da una apariencia intimidante (aunque parece más tímido en presencia de las niñas). Sus ojos son muy parecidos a los de un gato, como la mayoría de los miembros de Nekoma.
Su personalidad es muy similar a la de Tanaka. Él es fuerte y es muy fácil de enfurecer. Cuando no está molesto y gritando, se le suele ver...
