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About Monster Girls Onsen
Monster Girls Onsen is an 18+ anime visual novel with light management elements, set at a mystical Japanese hot spring you unexpectedly inherit. By day, you run the onsen, serve guests and expand its facilities. By night, you meet four monster girl spirits: the regal sun goddess Amako-sama, the shy ghost Senako, the icy beauty Yukino and the playful fox Hina.
Run the onsen
Manage and upgrade your traditional Japanese onsen as you work to establish yourself as its rightful master. You must earn the spirits’ trust and satisfy their desires.
Build relationships
Develop relationships with Amako-sama, Senako, Yukino and Hina. The story includes emotional confessions and erotic encounters, with fully illustrated NSFW scenes featuring multi-stage animations. These nights also reveal secrets about the spirits and the hot spring.
Art and storytelling
The game combines cozy management with erotic storytelling, using 2D anime-style art with a classical Japanese aesthetic.
Frequently asked questions
The best price for Monster Girls Onsen is $7.99 at Steam. It is the only shop with an offer that activates in your country.
The minimum requirements for Monster Girls Onsen are: Windows 7, GeForce GTX 760, Intel Core i5-4460, 2 GB RAM, 500 MB storage. It runs on Windows only. The recommended specs are in the System requirements section.
No. Monster Girls Onsen is a single-player game.
Mostly, yes. Valve rates Monster Girls Onsen as Playable on the Steam Deck: it runs, but may need some manual setup.
Yes. Monster Girls Onsen is the full base game. You need nothing else to play it.
Steam lets publishers create keys to sell in other shops. Once you activate a key, the game is yours to keep, just like a store purchase.
Disclaimer: CD keys have an inherent 1–2% average failure rate. Check the shop terms for buyer protection info. Steam offers no buyer protection for keys bought in other shops and doesn't refund them.











