Reviewed work by おさかなの旗 · View on DLsite
A sweet smell drifting through a best friend’s room turns out to be a new drug spreading through the slums, and the heroine Tuuli starts pulling on that thread — that’s the entire pitch of Tuuli — The Saint Sleeps in Sweet Smoke, a Nordic-flavored, drug-themed R18 roguelike RPG from circle Osakana no Hata, currently in early access. It’s aimed at players who want corruption to be a system rather than a cutscene: selling your body, hurting people, and taking the drug yourself are all choices with mechanical consequences. Go in knowing two things up front — it’s an RPG Maker early-access build, and the circle itself tells you to play the trial version before buying.
What works
The most interesting thing here is how the game frames its investigation. Progress comes from exploration and canvassing — talking to people, chasing leads on the drug — and the story unfolds as you dig. Layered on top of that is a morality system with real teeth on paper: the deeper you sink into the slums, the more your body and mind degrade. You can prostitute yourself for money or information. You can beat people you don’t like, or kill them. You can start using the drug you’re supposed to be investigating. And the game reacts socially — cruel behavior drives decent people away from you and draws the wicked in. The premise is essentially “how far will you fall to get what you want,” and unusually, the falling is something you opt into rather than something the plot railroads you through.
The build system reinforces that same choice. Combat runs on four builds — Hunting, Self-Defense, Chastity, and Depravity — fueled by Aether earned from defeating enemies during exploration. Putting Chastity and Depravity on the same menu as your combat stats is a smart bit of design: your relationship to the erotic content is literally part of your character build, not a separate toggle. Combine that with the roguelike structure and the defeat mechanic — lose to certain special enemies and Tuuli gets assaulted — and preparation before each expedition actually matters. H-events also trigger during investigation and downtime, so the adult content isn’t gated purely behind losing on purpose. The tag list confirms voice acting and animated scenes, which puts it above the static-CG baseline for the engine.
The early-access terms are also genuinely buyer-friendly, and worth spelling out because plenty of circles handle this worse. There’s no paid DLC planned, all future content updates are free for existing buyers, and while the price may rise as content is added, owners will never be charged the difference. Buying early locks in the lowest price for the finished game — a fair deal, as long as you’re comfortable with the risk that comes with it.
What doesn’t
That risk is the honest problem: right now, a lot of this game exists as a design document rather than a proven experience. It’s an early-access build with no stated content volume — no scene counts, no indication of how much of the corruption-and-reputation system is actually implemented versus planned. Systems like “your cruelty changes who associates with you” are easy to promise and notoriously hard to execute well, and there’s no track record here to lean on. When the circle’s own store page strongly recommends playing the trial first to see whether the tone and gameplay suit you, take that as the honest self-assessment it is.
The engine is also worth tempering expectations around. Roguelike structure in RPG Maker can work, but the engine wasn’t built for it, and how much run-to-run variety survives the implementation is an open question the description doesn’t answer. And the content itself is uncompromisingly dark — coercion, dubious consent, assault, and drug use are core themes, not seasoning. That’s the appeal for the target audience, but if any of those tags give you pause, this is not the work that will win you over.
Who should buy this
This is a Japanese-only release with no English support, and that matters more here than in a pure action title: the core loop is investigation and talking to people, so text carries real weight. The good news is that RPG Maker games are the friendliest possible case for a texthooker plus machine translation, and the mechanical corruption systems, animated H-scenes, and voice acting deliver plenty even through a rough translation layer. If you’re a corruption-RPG fan comfortable with a machine-TL setup — or you read Japanese — and you don’t mind funding early access, you’re the audience. The free trial exists; use it to test both the game and your translation workflow before spending anything.
Verdict
6.5 / 10 — provisionally. The systems-driven corruption premise, honest fall-from-grace framing, and fair early-access terms make this one of the more interesting pitches in its niche, but too much of it is still a promise rather than a product, and the score can only rise or fall once the finished build shows how much of that design actually made it in.
This is the Japanese-language store. International credit cards and PayPal are accepted. The game itself is in Japanese.
Tip: If the DLsite page opens in Japanese, use the language selector at the top-right of the page (globe icon) to switch to English.