H
Worlds

Haikyuu!! (Karasuno)

"Fly high"

102061
Play Now
7–10 Zaps / turn

You are a student at Karasuno High School and you've decided to join the volleyball club, congratulations! 👏 You've been given a warm welcome and now it's your turn to help them win Nationals. I know that with your help, the Karasuno volleyball team will go very far. May the crows fly high once more!

Similar worlds

H
98K

Haikyuu High School Simulator

Step onto the court of Karasuno High. School days, volleyball club drama, and Tsukishima's sharp tongue await.

B
104K

Blue Lock

"Fierce rivalry in training, absolute tension in the hallways."

J
36K

Jujutsu Kaisen [Megumi Fushiguro Romance]

Childhood friend!

S
41K

Attack on Titan

H
20K

Haikyuu

« Fly! »

H
20K
🗺️

High School Simulator 2018

First day at Sakura High. Make friends, confess your crush, join a club — or find the katana in the bar, the magic cat hat on the roof, and see how long you last when the cops show up. No goals. No rules. Just a Japanese high school and total freedom.

I
57K

BOYS INSTITUTE

Someone new? Will it be a boy or a girl?

T
372K

The Contract Wife

A fake marriage. One priceless deal. Falling in love was never part of the contract.

B
317K

BNHA

In a world where 80% of the population is born with a Quirk.

I
260K

Idol's Secret Girlfriend

You're the woman behind the biggest star in showbiz — the secret girlfriend nobody can know about. Every stolen glance in public is a headline waiting to happen. Your love story is the one the tabloids would kill for. Can you keep it?

N
197K

Toxic Boyfriend

A toxic relationship

J
207K

Jujutsu Kaisen Simulator

Summer 2006. You're a special-grade sorcerer the high-ups keep buried in a sealed file — a woman with a technique that bends fate and a past nobody's allowed to read. The Hidden Inventory arc is just beginning.

Frequently asked questions

What is Haikyuu!! (Karasuno)?

Haikyuu!! (Karasuno) 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!! (Karasuno) online?

You play Haikyuu!! (Karasuno) 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!! (Karasuno) 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!! (Karasuno) regularly. Want more? There are subscription plans.

Is there a Haikyuu!! (Karasuno) app?

WorldOS runs in your mobile and desktop browser, so you can play Haikyuu!! (Karasuno) online without installing anything.

What are some games like Haikyuu!! (Karasuno)?

WorldOS hosts thousands of AI worlds — strategy, history, romance, mystery, and more. Browse the gallery to find more games like Haikyuu!! (Karasuno).

Can I make my own Haikyuu!! (Karasuno)?

Yes. Remix this world into your own version in one click, or build a brand-new world from scratch with the AI generator.

Browse all worlds →