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Steam

Marshmallow Imouto Succubus

Catalogue information flags mature content for this game.

Tsukikawa Keisuke had a strange dream. That dream involved his younger sister but instead of her usual, innocent self, she had lust in her eyes. So he finds out that a succubus lurks within her! How will he choose between his innocent sister and the allure of a lustful succubus?!

Released · 2023-09-22

At a glance

About this game

Core game information and the store records it came from.

Title: Marshmallow Imouto Succubus
Content: Game
Release date: 2023-09-22
Developer: Orcsoft
Publisher: Sekai Project
Platforms: Windows
Steam Deck: Unsupported Valve's compatibility rating
Connected stores: 1

Steam Steam source details

Store title: Marshmallow Imouto Succubus
Product ID: 2243980
Developer: Orcsoft
Publisher: Sekai Project
Store platforms: Windows
Source checked: 2026-10-18 15:26 UTC

Open official store page ↗

How you can play

Features and tags

Select a feature to find other games that have it.

Ways to play

Single-player

Store features

Family Sharing

Store tags

Genres

Adventure
Casual

Categories and genres from the Steam store, observed 2026-10-18. Store tags from Steam, as players and the store apply them.

Compare & explore

One game, connected stores

Each store keeps its own prices and observations. We prefer the latest recorded EUR price for Europa. When the displayed currency differs from the store amount, a separate approximate value may use the latest available ECB reference rate.

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Lumiri price context

Recorded price comparison

Matching store titles. One currency. One market.

EUR SE

Lowest recorded amount

19.50 EUR

Steam

Recorded 2 days ago Over 48 h old

Difference between stores

—

One comparable store. A difference needs another matching store price.

Distance from observed low

At observed low

Steam listing only. Low: 19.50 EUR.

Last seen 2026-10-18

Newest included record2026-10-18 15:26 UTC

1 record is over 48 hours old.

1 included price record from 1 store · 1 linked listing

See the 1 included observation

Steam history →Marshmallow Imouto Succubus
19.50 EUR
2026-10-18 15:26 UTC2 days ago · over 48 h old

How this comparison works

Only original EUR amounts recorded for SE and matching titles linked to this game are compared. Edition words and numbers must match. Other editions, source-market fallbacks and currency estimates are excluded.

These are recorded observations. Check the store for the current price, availability and included content. Historical lows belong to the named listing in this market and reflect the history Lumiri GameDB has collected.

Steam

Marshmallow Imouto Succubus

19.50 EUR

Price recorded 2026-10-18 15:26 UTC

Player activity

Observed Steam player history

Latest 1,000 points at most. Individual observations.

Last observed Steam players: 0
Observed peak · 24h: —
All-time observed peak: 0
Average players · 24h: —

Player history is taking shape

No local player observations yet. Collected samples will appear here over time.

Recorded prices

Price history · Steam

EUR observations for market SE. History belongs to the selected store listing; regional prices and taxes may differ.

Historical low observed by Lumiri GameDB: 19.50 EUR, last seen 2026-10-18

First recorded price. More observations will build the price history.

View 1 recorded prices

2026-10-18 15:26: 19.50 EUR

Prices observed by Lumiri GameDB in EUR.

Catalogue activity

Recent changes

Prices, release dates and store listing updates we detected. Repeated store refreshes are grouped.

No changes detected yet. Price and release updates will appear here.