Reviewed work by Steneko Laboratory · View on DLsite
Steneko Laboratory’s first DLC for its pixel-art action game DECOY: The Ultramarine Witch trades urgency for coziness — you’re helping the mayor build a new commercial facility, running errands for townsfolk, fishing, racing, and unlocking new pixel-animated H-scenes along the way. It’s aimed squarely at people who already own and enjoyed the base game and want more time in its world rather than a new adventure. One thing up front, though: this expansion only works with the Japanese PC version of the base game, which changes the buying math considerably for overseas players.
What works
For an expansion, this is a genuinely broad content drop rather than a thin scene pack. The framing premise — cooperating on the construction of a new commercial facility and then living alongside the townspeople — gives the DLC a slice-of-life backbone, and it’s fleshed out with an unusual amount of side content: a race tournament, a soccer minigame at the gym, and a fishing system where your catches get donated to an aquarium you gradually fill out into a showpiece tank. Doing well in these activities earns rewards, so they’re not purely decorative. On top of that there’s a proper new map: a treasure hunt that starts with a clue found in a library book and leads you, alongside a kunoichi companion, through breakable walls into a mansion-like ruin hiding buried treasure. That’s the closest thing here to the base game’s action side, and it’s good that the DLC includes at least one real dungeon-style addition rather than being all town errands.
The H content is the other pillar, and on paper it delivers what fans of the base game would want. The circle’s signature pixel-dot animations return, drawn fresh for a variety of new situations, and the DLC explicitly adds two things the base game didn’t have: group scenes with multiple participants, and H-scenes for characters who never got them in the main game. Progressing through town events also unlocks “more intimate time” with characters, so the lewd content is threaded through the daily-life loop rather than dumped in a gallery. The fetish menu skews classic oneesan territory — older-sister types, big breasts, paizuri, fellatio, handjobs, creampies — all voiced. If the base game’s animation style worked for you, this is more of exactly that, in situations the main story didn’t cover.
It’s also worth noting the circle is actively supporting the game: the DLC rides on a base-game update (Ver 2.02), installation instructions are published and maintained, and there’s a dedicated support form for problems. That’s more post-launch care than a lot of doujin circles manage.
What doesn’t
The compatibility restriction is the big one, and for an English-speaking audience it’s close to disqualifying: this DLC is Japanese PC version only. It explicitly does not work with the English or Chinese releases of the base game. So if you bought DECOY in English — the natural choice for most readers of this blog — you cannot use this expansion at all. You’d need to own (or buy) the Japanese version of the base game just to install it. On top of that, it doesn’t run standalone, requires updating the base game to the latest version first, and installation involves following a manual step-by-step procedure rather than just launching an installer. None of this is unusual for doujin DLC, but stacked together it’s real friction.
The other honest caveat is tone. The subtitle translates to something like “a tranquil lamplight,” and that’s accurate: the bulk of the new content is peaceful town life and minigames — fishing, soccer, races, favors for NPCs. The ruins map is the only new combat-adjacent area mentioned. If what you wanted from a DECOY expansion was more action content, this leans much harder into the relaxed, relationship-building side, and the store description doesn’t pin down exactly how many new H-scenes are included, so the total volume is hard to judge before buying.
Who should buy this
This is Japanese-only, with no English support — and unlike most Japanese-only doujin games, you can’t even brute-force it, because it requires the Japanese version of the base game and is incompatible with the English release. If you already own the Japanese version of DECOY and don’t mind navigating menus and quest text with machine translation, the actual content is friendly to non-readers: minigames, an action-style ruins map, and visually-driven pixel-animated H-scenes don’t demand much Japanese. But if you own the English base game, or were planning to buy it in English, this DLC simply isn’t usable for you — wait and see whether an English-compatible version ever materializes.
Verdict
7 / 10. As an expansion it’s admirably generous — a new dungeon, several minigames, a town-building frame, and fresh pixel-animated H-scenes including group play and previously sceneless characters — but the Japanese-version-only lock makes it impossible to recommend to anyone who owns DECOY in English, which is exactly the audience reading this.
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.