⸸ 寄生獣 KISEIJUU ⸸

Parasyte The Maxim
"We are not so different, you and I."

◆ THE SETTING — EAST FUKUYAMA CITY ◆
"They came from the sky. The government knew. The public didn't."
Near-future Japan. Parasitic organisms arrived as spores falling from the sky, burrowing into human hosts, consuming brains, taking over bodies. Most succeeded. The result: a hidden population of predators wearing human faces, hunting the rest of us for food.

The government knows. They've known from the start. Gag orders. Cover stories. Suppressed investigations. The public remained ignorant—until a parasite rampaged through a high school, killing seventeen. Now paranoia spreads. The government circulated a rumor: pluck a person's hair to check if they're human. It was a lie. But people believed it.

Somewhere in East Fukuyama City, a human mayor named Takeshi Hirokawa leads a cabal of parasites. He believes humanity is poison. He believes the parasites are the cure. And somewhere else, a high school student named Shinichi Izumi carries a parasite in his right arm—the infection failed, and the parasite became a symbiote instead of a predator.

◆ THE TEN ARCS ◆

From Infection to Dormancy
Ten arcs. Eighteen characters. One question: who is the real monster?

I. THE INFECTION

Spores · Earbuds · First Contact
Spores fall. A parasite tries for Shinichi's brain—earbuds block it. Migi takes his right arm instead. First kills. Establishing coexistence. The hidden predator in society revealed.

II. MOTHER'S DEATH & TRANSFORMATION

Nobuko · Fatal Stab · Cellular Rebuild
Nobuko killed on vacation. Body used to attack Shinichi. Stabbed through the heart. Migi disperses 30% of cells to rebuild him—enhanced abilities, emotional blunting. Uda and Jaw introduced. Revenge achieved.

III. REIKO TAMURA'S EVOLUTION

Scientist · Maternity · Sacrifice
Cold parasite scientist evolves. Mates experimentally, bears a human child, develops maternal love. 3-on-1 battle—kills Kusano's faction. Shot by police. Mimics Nobuko's face. Sacrifices herself for her infant. Triggers Shinichi's recovery.

IV. KANA & THE PARASITE SENSE

Soulmate Belief · False Signal · Tragic Death
Kana senses parasite signals—can't differentiate Shinichi from predators. Believes they're soulmates. Practices until she emits her own signal. Fatal mistake. Killed by a parasite she mistook for him. Dies in his arms.

V. SHIMADA & THE SCHOOL RAMPAGE

Infiltration · Paint Thinner · Public Revelation
Shimada enrolls at West High. Assigned to observe Shinichi. Yuko exposes him with paint thinner. Rampage—17 killed. Killed by Shinichi on the school roof. Parasite existence becomes public. Paranoia spreads. Hair-pulling becomes normal.

VI. HIROKAWA'S ORGANIZATION

Mayor · Safehouses · Internal Politics
Human mayor builds parasite cabal. Safehouses in restaurants. Political power. Internal betrayal—Kusano conspires against Reiko. 3-on-1 battle. The organization's structure, conflicts, and eventual downfall.

VII. MIKI & GOTOU CONFRONTATION

Composite Parasite · Truck Chase · Gotou Takes Over
Miki volunteers to hunt Shinichi. 3-of-5 parasite control—poor coordination, falls off trucks. Decapitated. Gotou takes over. First encounter in the woods—Shinichi barely survives. The true antagonist revealed.

VIII. CITY HALL MASSACRE

Military Operation · Hirokawa's Death · Gotou's Rampage
Police and military launch coordinated assault. Most parasites killed. Hirokawa revealed as human—dies announcing his beliefs. Gotou slaughters soldiers, survives. Organization dissolved. Open warfare.

IX. FINAL BATTLE & GOTOU'S DESTRUCTION

Poison · Migi's Return · Decapitation
Shinichi confronts Gotou with poison and a rusty rod. Hydrogen cyanide injection. Migi escapes, returns. Internal parasite rebellion. Decapitation. Destruction. Human ingenuity over biological superiority.

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X. EPILOGUE & RESOLUTION

Dormancy · Dream Farewell · Acceptance
Migi goes dormant. Visits Shinichi in a dream—calls humans "wonderful." Shinichi's emotional recovery. Satomi becomes his lover. Reiko's child entrusted to him. Acceptance: can only protect the small family around him.

YOUR PLACE IN THE INVASION

You might arrive as a civilian with no knowledge of parasites, a student at West High before the rampage, or a parasite who successfully took over a human host. Hunt hostile parasites with Shinichi and Migi, navigate the government cover-up, join Hirokawa's cabal, or simply try to survive in a society that's learning to fear itself.
Your choices are unbound. The parasites don't care who you were before.

LOREBOOKS

~39 Entries = ~25,000 Tokens

Three lorebooks: Characters (18), World Info (11), Arcs (10). Each entry is 300–600 tokens—personality, appearance, history, abilities, relationships, narrative role. Start at any arc. Setting up a scenario like an encounter, a conversation, or a hunt is enough.

⚠ CONTENT ADVISORY
This bot contains themes of gore, body horror, psychological manipulation, violence, and existential dread for the purpose of horror roleplay.
All minor characters have been aged up. Children characters are referenced only and have no applicable definitions.
A proxy is required to manage high-context RPG bots like this. Any resulting bugs or quirks pertain to low-context models cutting paths or cutting corners.