SELF-IP / IN DEVELOPMENT

Bloom PrisonKagoku Jōran

A four-player co-op roguelike set on a forbidden island at the end of the Edo period. A dark Japanese aesthetic, the five-element Bloom System, abandoned greenhouses overgrown with camellias. ZehnStudio's flagship self-IP title.

Self-IP 4-player co-op Roguelike Japanese dark

— STORY

At the end of the Edo era, a forbidden island lies far across the sea — Kagoku. The apothecaries sent to retrieve its miracle herbs never returned.

Instead, those who drank the medicines that did make it back lost their minds. Cities crumbled. The shogunate's last resort: send condemned criminals to the island in their stead.

You are a ninja with a million crimes carved into your chest. Together with your companions, you land on the island — to retrieve its herbs, and to purify your sins along the way.

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4-player co-op roguelike

As sin-bearing ninja, head deeper into the island. Work with your team to reduce your sins and liberate the island from human EGO.

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The five-element Bloom System

Five elemental forces — wood, fire, earth, metal, water — weapon-embedded special abilities, and 60 skills. Every run builds differently.

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Japanese dark aesthetic

Camellias blooming through ruins, moss-covered torii, weathered greenhouses. A dark, beautiful late-Edo world rare in Roblox.

— CAST & STORY

Characters & Story

Sin-bearing shinobi, an apothecary, a maskwright, a princess of the imperial court, and a daughter sleeping at the deepest point of the island. Eleven figures whose lives orbit the Bloom Prison.

Protagonist Age 16–17

Saku — The Convict Shinobi

"Stand up. Where are you going to go?"

A teenage shinobi sent to Kagoku as a convict, carrying a "million sins" tattooed onto his soul. His hope: bring back the white healing flower for his little sister back home. Trademark crimson scarf, an oversized Fuma Shuriken edged with faint crimson glow.

Playable (branching path) Age 16–17

Saku — Samurai Azure / Warden

"If the order falls, the people I want to protect fall with it. So I stay inside."

The same protagonist, recruited from convict shinobi to shogunate samurai — defending the system from within. Indigo-blue lacquered armor, single katana, the crimson scarf reduced to a thin cord at the wrist. A defensive playstyle: barriers, ally protection, suppression over annihilation.

Playable (branching path) Age 16–17

Saku — Samurai Crimson / Insurgent

"I can pretend to be a puppet for as long as it takes. I never forgot the shinobi arts."

The same protagonist, recruited into the samurai class — and burning the system from within while wearing its uniform. Crimson-black armor, two blades, a folded shuriken hidden at the back. An aggressive playstyle: counterattacks, illusion-cutting strikes, faction-bonus damage against the shogunate's own forces.

Playable (late unlock) ~50

Jin — Elder of the Shinobi Village

"I tried to save the children. That excuse is the only thing keeping me a man."

A former convict of these same islands, now the head of a mainland ninja village raising orphans. Pharmacologist as well as martial researcher — herb pouches at his belt, worn katana at his back. The silver in his hair came in earlier than it should have.

Lobby NPC / light playable mid-40s

Noen — The Maskwright

"Your eyes — exactly the same as the man who died last week."

A craftsman of ceremonial and theatrical masks, he himself wears a thin half-mask of pale lacquered wood covering only the lower half of his face. Unsettling, never hostile, sees everything — the kind of NPC players will revisit between runs just to hear what he has noticed.

Playable (late unlock) late 30s

Gennai — The Archaeologist

"There were flowers here long before us. I am beginning to think we are not the first to make this mistake."

A scholar mapping the ruins that predate the shogunate's prison administration. Round Edo-period spectacles, leather satchel of scrolls, a lantern-topped staff. His power is knowing things — when he joins the party, the player begins to understand what kind of story this really is.

Major NPC mid-20s

Aya — The Flower-Warden Princess

"If I carry the sorrow, someone else does not have to. I was told that, once."

A young noblewoman kept in the palace as the nation's "Flower Warden", forbidden to cry since childhood because her tears bloom into flowers that re-enact other people's grief. White-and-pink court robes, crimson obi, a single white camellia in her hair. No mask — her face is always visible, and that is part of the burden.

Principal antagonist late 40s

Kuroemon — Shogunate Steward of the Bloom Prison

"Without the Bloom Prison, the country breaks under its own grief. To let a gentle flower bloom for them — that, too, is governance."

A mid-ranking but immensely powerful shogunate official who decides who is exiled, who is recruited, who is quietly removed. Polite, soft-spoken, twin-sworded, with a paper fan that issues silent commands. Not a brute — a realist whose arguments are difficult to dismantle.

— TIMELINE

A short history of Kagoku

From a time before the shogunate to the day the game begins, in Hana-reki 100.
The history of the prison islands, and how each character arrives at the moment the player meets them.

Ancient

For as long as anyone remembers, the islands have grown flowers that respond to human emotion.
Hana-reki 0

The shogunate begins administering the Kagoku islands as a penal colony.
Hana-reki 62

The apothecary Rin is dispatched to Kagoku to treat the convicts.
Hana-reki 64

Jin — later to become elder of the shinobi village — is exiled to Kagoku as a convict.
Hana-reki 67

Rin and Jin meet on Kagoku and marry.
Hana-reki 76

Jin is granted permission to return to the mainland, where he founds the shinobi village.
Hana-reki 80s

The shogunate begins to take an interest in the powers of the Kagoku flowers.
Hana-reki 90

Jin, now elder of the shinobi village, takes in an orphan boy named Saku.
Hana-reki ~95

The maskwright Noen begins crafting ritual masks tied to Kagoku.
Hana-reki ~97

In the imperial palace, Shiroha is placed at Aya's side as the next Flower Warden candidate.
Hana-reki ~98

The archaeologist Gennai begins investigating ruins that predate the Kagoku administration.
Hana-reki 100

The game begins. Saku, branded with "a million sins", is sent through Edo to Kagoku as a convict shinobi.

— MODELS IN PRODUCTION

Models in production

A selection of character and enemy models currently in 3D production — from sin-bearing ninja to the EGO that haunts the island.

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