Synopsis: To search for my missing friend, relying on the last "western mansion rumor" I heard, I left home. Running desperately through the pathless forest, as if waiting for me, a western mansion appeared deep in the woods. Suddenly my consciousness faded, and when I noticed, I was inside an unfamiliar building. It seems I am inside the western mansion.

Basic Rules 1: Traverse the corridors, descend the stairs, and escape from the mysterious western mansion! Anomalies may appear in the corridors. In such cases, hide in the shadows to let them pass or use the cross to attack and deal with them properly to proceed.

Basic Rules 2: The western mansion ranges from ∞ floors with no anomalies to floors 1–8 where anomalies appear randomly. You descend to the lower floor each time you clear a floor.

Characters: Shota-kun: A boy who wandered into the western mansion while searching for his friend. Short pants are his trademark. Demonic Onee-san: A demon onee-san working as a maid in the western mansion. Clumsy and scatterbrained, no one would hire her until a kind-hearted master picked her up. She forgets that debt of gratitude and, while the master is away, doesn’t work and spends her time freely as she pleases. Shadow Onee-san: A shadow onee-san who can hide in darkness and freely change her appearance. Her true identity is the black cat kept in the western mansion!? She is the master’s pet cat, but under the bad influence of the surrounding onee-sans she teases Shota-kun excessively. However, she doesn’t understand the meaning and thinks she’s just playing. Ghost Onee-san: A ghost onee-san who started living in the western mansion after death. She looks like she’s wearing a sheet. She’s shy and often hides in the shadows fidgeting, giving a seemingly pure impression, but she is actually a super-dreadnought-level pervert exhibitionist. Rumored cause of death: techno-break from extreme masturbation in the winter forest. Painting Onee-san: A beautiful painting onee-san decorating the western mansion. The author’s grudge (sexual fetish) breathed life into the painting. Normally she lives in a 2D world but can come out of the painting with physical form. She has strong maternal instincts and pampers Shota-kun like a baby. Doll Onee-san: An antique doll onee-san wearing a vivid green dress. Haughty and looks down on people. Her hobby is tinkering with machines; she remodels dolls, stuffed animals throughout the mansion, and even her own body. Rumored to be plotting to form a “Doll Alliance Army” and seize control of the western mansion. Master: Away long-term due to work, he left the western mansion to his demon maid onee-san. He has no idea that the maid not only neglects her duties but also brings Shota-kun inside and does as she pleases.

Update History: 2026-02-20: Bug fix (resolution bug corrected).

Additional Info: R18 adult game with violence expressions and sexual depictions. Dot-art erotic scenes only. Gallery unlocks by encountering all anomalies. Multiple patterns per character.

8-Floor Western Mansion - Update Log / Devlog