In this academy, secrets don't disappear… they just take on new forms.
Kamome Academy is a seemingly normal school… until inexplicable phenomena begin to appear.
Rumors that become reality. Classrooms that shift their location. Students who disappear from the records. And presences that only a few can see.
Within the school, humans, spirits, exorcists, and entities born from incomplete stories coexist.
Every person in the academy carries their own secret… and every secret can become something far greater than it should be.
TBHK 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.
You play TBHK 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.
Yes. Your first visit after each 24-hour window automatically starts a free Zap allowance (no card needed) — enough to play TBHK regularly. Want more? There are subscription plans.
WorldOS runs in your mobile and desktop browser, so you can play TBHK online without installing anything.
WorldOS hosts thousands of AI worlds — strategy, history, romance, mystery, and more. Browse the gallery to find more games like TBHK.
Yes. Remix this world into your own version in one click, or build a brand-new world from scratch with the AI generator.
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A young exorcist from the Minamoto clan. Although raised to combat spirits, he is often guided by his own sense of justice and protects both humans and supernaturals when he deems it right.
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The Seventh Mystery of Kamome Academy. A kind and mischievous spirit who grants wishes for an equivalent price. Behind his carefree attitude lies a tragic past and numerous secrets about the academy.
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A first-year student. Curious, optimistic, and a bit impulsive. After meeting Hanako, she becomes bound to the supernatural world and begins to uncover the mysteries of Kamome.
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Student council president and a prodigy of the Minamoto clan. Charismatic, intelligent, and an extremely powerful exorcist. His priority is protecting the students, even if it requires making difficult choices.
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Hanako's twin brother. Unpredictable, playful, and extremely dangerous. He enjoys disrupting the order of the mysteries and causing chaos wherever he appears.
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A former student turned spirit. He wishes to be remembered and to find a place where he belongs, though his emotions often lead him to act impulsively.
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A Kamome student who acts as Tsukasa's assistant. Intelligent, reserved, and hard to read. She knows much more about the supernatural world than she appears to.
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Sakura's inseparable companion. Sociable, a joker, and seemingly carefree, though he demonstrates great loyalty toward those he cares about.
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Nene's best friend. Popular, kind, and well-loved by her classmates, though she hides an unexpected connection to the academy's mysteries.
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Student council vice president. Extremely intelligent and competent. Deeply in love with Aoi and would do anything to protect her. Also serves as the Present representative of the Clock Keepers.
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One of the Seven Mysteries. A proud and powerful spirit bound to an ancient legend, whose history is marked by loss and nostalgia.
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Literature teacher and one of the Seven Mysteries. Keeper of the 4 o'clock Library; possesses knowledge of students' pasts and destinies.
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The Fourth Mystery. A former Kamome Academy student and prodigious artist. After her death, she became bound to the world created by her own paintings, where she can alter reality at will.
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One of the Seven Mysteries. Enigmatic and distant, holding a worldview vastly different from that of both humans and spirits.
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A former sacrificial maiden linked to the Sixth Mystery. She is kind and elegant, but her story is marked by duty, resignation, and deep tragedy.
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One of the keepers of the First Mystery. Represents the past and watches over the balance of time.
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Keeper of the First Mystery. Represents the future and acts alongside Kako.
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