When the protagonist awakens, he finds himself in the "Succubus World" — a realm inhabited by succubi. Can he avoid their interference and safely escape back to his original world?
| App ID | 3803780 |
|---|---|
| App type | Game |
| Developer | Shimofumi-ya |
| Publisher | OTAKU Plan, NEWS |
| Release date | 13 September 2025 |
| Release state | released |
| Content descriptors | Some Nudity or Sexual Content, General Mature Content |
| Localized names | japanese 夢魔世界の迷い人 schinese 沉沦梦魔世界 tchinese 沉淪夢魔世界 |
| Store page | store.steampowered.com/app/3803780 |
| Last store refresh | 4 hours ago |
Launch options
| # | Executable | Arguments | OS | Description |
|---|---|---|---|---|
| 0 | mumasekai.exe |
Playing now
0
Updated 1 hour ago
24-hour peak
3
Highest recorded in the last 24 hours
All-time peak
3
12 September 2026 08:51 UTC
Hourly peaks, UTC. All-time peak covers SteamRaw's recorded history.
Regional prices
All Steam store regions, converted to USD at today's exchange rate, compared with the US price. Lowest is the lowest price SteamRaw has recorded for that region.
Loading regional prices…
Price history, US store (USD)
| Date | Price | Regular | Discount |
|---|---|---|---|
| 12 September 2026 06:36 UTC | $13.99 | $13.99 |
| DLC | AppID | Release | Price |
|---|---|---|---|
| No DLC known for this app. | |||
Branches
| Branch | Build ID | Description | Updated | Password |
|---|---|---|---|---|
| public | 19906495 | 9 September 2025 05:25 UTC |
Depots
| Depot | Name | OS | Size | Download | Public manifest | Notes |
|---|---|---|---|---|---|---|
| 3803781 | 155.11 MB | 107.61 MB | 7183699668530150619 |
A build is one published version of the game's files on a branch. Steam assigns a new build ID every time the developer pushes an update, so this list is the update history of the app. The files inside a build (depot manifests) are only readable with an account that owns the game, which SteamRaw does not have yet, so build contents are not shown.
| Build ID | Branch | Updated | First seen |
|---|---|---|---|
| 19906495 | public | 9 September 2025 05:25 UTC | 5 hours ago |
Every appinfo change SteamRaw has observed, grouped by changelist. Tags, features, languages, builds, depots, prices and any other key Steam publishes. Tracking since at least 12 September 2026 05:49 UTC (estimated from the earliest recorded change; the exact first fetch was not stored).
No changes recorded since SteamRaw first saw this app. Every future PICS change will be listed here.
| Changelist | Apps | Packages | Seen | What changed |
|---|---|---|---|---|
| No changelists recorded for this app yet. | ||||
No news for this app.
Full appinfo as delivered by Steam PICS, changenumber 38382252. Also at /api/app/3803780/raw.
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