Screenshots
Watch trailer on Steam ↗Marshmallow Imouto Succubus
Orcsoft · Published by Sekai Project
Content notice: Game contains suggestive language and themes not suitable for all ages.
Positive — 82% positive (22 reviews)
Last updated 27 Sept 2026
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?!
£16.75
Lowest price we've ever recorded
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Price history
Adventure, Casual · 2023 · More £15 - £30 games
Explore Tsukikawa Keisuke's journey as he navigates the complexities of his sister's dual nature, choosing between innocence and temptation. A casual adventure from Orcsoft that blends mystery and decision-making in its unique premise.
About this game
STORY
Tsukikawa Keisuke had a strange dream. That dream involved his innocent younger sister, Saki. Saki was a naïve girl who even believed that babies were made from just kissing. However in his dream, Saki’s innocence was replaced by eyes filled with lust as she creeps into Keisuke’s bed. The next day, Saki was her same innocent self to Keisuke’s relief. He was relieved that it was a merely a dream.
However, he soon learns from his father that a succubus lurks within his little sister. Having to choose between his dear, innocent little sister and the allure of a lustful succubus, what will Keisuke do?
FEATURES
- Visual novel with 2 possible endings
- Japanese voice acting (Except protagonist)
- Voiced line playback
- History/backlog function
System Requirements
Will my PC run this? →Minimum
- OS *: Windows Vista, 7
- Processor: Pentium 3 800 MHz and above
- Memory: 512 MB RAM
- Graphics: 1280 x 960 supported graphics card
- DirectX: Version 9.0
- Storage: 250 MB available space
Supported Languages
*languages with full audio support
Latest news
Patch NotesOfficial
Update Notes for Sep 23
An update was pushed out that makes some minor changes to the English build of the game.Read full article on Community Announcements (sekaipro_chris)
