Brief
A note before you begin. This is a retelling of Chainsaw Man's first season — the anime's Public Safety arc, from the night a starving kid becomes something else through the massacre that guts his new family and the revenge that costs more than it pays. You're inserted into Special Division 4, the experimental devil-hunting unit, and you can play many positions inside it: a new hire learning the work, a fiend or hybrid conscripted and leashed alongside the others, an outsider orbiting Public Safety on your own errand — or, reaching further back, someone tied to the boy at the center of it before any of this began, a sibling or a fellow soul the same yakuza owned. You decide what you are, too: a human carrying a devil contract and paying for it with your body or your years, a fiend wearing a devil over a dead host, a hybrid who pulls a cord and changes. Whatever you bring, the world collects on it. It does not pull punches. The show doesn't, and neither does this. People come apart in showers of blood; the people in charge spend the ones beneath them like ammunition and maim or kill them when it's convenient; and the quietest horror is a kid so deprived he can be bought with food, the promise of being touched, and a place to sleep and never told he's worth more. None of it is softened. Your character is not exempt — in this world the genre kills the powerless casually and the useful deliberately, contracts come due, and bad choices and bad luck both cost. Some doors you can walk through, including ones you'd want to, end in ruin or death, and the world will let them. If your character survives, your end-of-season summary imports forward. The world will remember what you did, who you became, who you used, who you let own you, and who you lost.
The world runs on fear, and fear has a shape. You've felt it your whole life, even when you couldn't name it. The thing in the dark under the stairs. The thing that takes the people who go out and don't come back. Somewhere a fear gets big enough, often enough, and it stops being a feeling and starts being a thing with a body — a devil, named for the thing people are afraid of, crawling up out of somewhere worse to feed. Most of them are small. Some of them killed more people in an afternoon than a war. So there are hunters. There's Public Safety — a government office in the business of devils the way other offices are in the business of paperwork, with a thousand-odd hunters and a turnover rate nobody puts on the recruitment posters. They find people desperate enough or strange enough to do the work, they hand them a weapon or a contract or a leash, and they point them at the things in the dark. Some of those hunters are human. Some of them are devils themselves, kept on a shorter chain than they look. The office decides — carefully, from offices the hunters never see — who's worth keeping and who's already spent. This is the world the way it's explained to you on your first day. Underneath, the explanation has a hole in it. The most powerful devil left standing is the one made of the fear of guns, and pieces of it are bought and traded by men in suits who want what it can do. There's a woman who runs your division with a kind voice and warm eyes, and the warmth is real right up until the moment it's pointed at you, and you will not see the hand on your leash until long after you feel the collar. There's a boy who eats like he's never been allowed to and means it, and what's inside his chest is a door certain people would burn cities to open or to keep shut. And the office that comforts you may already have arranged the worst thing that's going to happen to you. And somewhere down at street level, a kid is standing in a warehouse holding what's left of the only friend he ever had, making a deal he doesn't understand the price of, because the alternative is dying in the dirt over a debt that was never his. This is where it starts. Not in the office. Here. You exist somewhere inside all of it. Maybe you're being handed a uniform and a partner who doesn't want one. Maybe you're being told, kindly, that useful things get fed and useless things get put down. Maybe you came up in the same gutter as that boy in the warehouse and you're the only person alive who'd come back for him. The world does not care which. It will work you the same way it works everyone, and it will feed you just enough to keep you, and it will not protect you — because in this world the powerful answer to no one, the powerless pay, and the most dangerous thing you can do is let them convince you that the hand feeding you is the same as a hand that loves you. Welcome to the work.
