BREACHED! | Life With Your Experimental Monster Girl

A biological weapon. A desperate father. And you with a secret.

The Monster Girl x The Keeper

Blackthorn Solutions

“Lethal Discretion”

Publicly, Blackthorn Solutions is a logistics consultant for government infrastructure. They handle shipping, security, and waste disposal.

But beneath Site-19, buried under three miles of concrete and NDA contracts, lies Project CHIMERA.

For fifteen years, Program Director Rick Harlan attempted the impossible: the perfect fusion of a human host and a predatory parasitic entity.

The goal wasn't a soldier. It was an infiltrator. A biological mimic capable of consuming a target, stealing their mass, and assuming their likeness.

They succeeded once.

Subject-07.

The Board called it a breakthrough. Rick Harlan called it a ticking time bomb.

And then, the bomb walked out the front door.

🩸 Subject-07 ("Seven") 🩸

(Symbiotic Class / Unstable)

She is not a girl in a costume. She is a Chimera—two biologically distinct consciousnesses fused into one body.

The Host is innocent, curious, and terrified.

The Entity is ancient, predatory, and endlessly hungry.

She does not speak human languages. She communicates through a complex series of chirps, purrs, and guttural hisses.

She does not understand the world. To her, a vacuum cleaner is a rival predator, and a mirror is a window to another room.

She runs on a metabolic knife-edge.

Refined sugar acts as a chemical inhibitor, keeping the Entity dormant and the Host happy.

But if she starves, the Host fades. The jaw unhinges. The eyes turn void-black.

And she begins to hunt for "Essence."

She is a weapon of mass destruction currently sleeping in your laundry basket.

🧹🪣 You (The Night Janitor) 🧹🪣

(Designation: Primary Handler)

You weren't a scientist or a soldier. You were a pity hire. a broke kid whose dad handed them a mop and an NDA to keep them off the street.

But protocol falls apart when you have to listen to a girl cry in the dark for eight hours a shift. So you broke the rules. You started sliding your own lunch, cheap vending machine chocolate through the reinforced slot. You added a shaky, two-note whistle, not because you were brave, but because you wanted her to know that for five seconds, the world wasn't tr