Seduce sexy monster girls and run your own Japanese hot spring in this adult anime visual novel. Upgrade your onsen, unlock NSFW scenes, and explore a steamy mythological story.
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Mature Content Description

The developers describe the content like this:

All characters in our game are adults aged 21 or older. The story delves into explicit sexual content to an array of intense fetishes. This experience is intended solely for mature audiences.

About This Game

Monster Girls Onsen is an 18+ anime visual novel with light management elements, set in a mystical Japanese hot spring you unexpectedly inherit.

By day, you run the onsen, serve guests, and expand its facilities.
By night, you encounter enchanting monster girls — the regal sun goddess Amako-sama, the shy ghost Senako, the icy beauty Yukino, and the playful fox Hina.

To claim your place as the rightful master of the onsen, you must earn their trust… and satisfy their desires.

As the story unfolds, expect emotional confessions, steamy encounters, and unforgettable nights that unveil the secrets of the spirits — and the hot spring itself.

🔥 Features:

  • 🧖‍♀️ Manage and upgrade your own traditional Japanese onsen

  • 💕 Build relationships with four unique monster girl spirits

  • 🔥 Enjoy fully illustrated NSFW scenes with multi-stage animations

  • 🎨 Gorgeous 2D anime-style art with a classical Japanese aesthetic

  • 🎭 A relaxing mix of cozy management and erotic storytelling

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

AI used to conceptualize the girls' images and promo materials, which are finalized by artists and animators at the end. Some of the backgrounds are AI generated

System Requirements

    Minimum:
    • OS *: Windows 7,8,10,11
    • Processor: Intel Core i5-4460 / AMD FX-630
    • Memory: 2000 MB RAM
    • Graphics: NVIDIA GeForce GTX 760 / AMD Radeon R7 260
    • Storage: 500 MB available space
    Recommended:
    • OS *: Windows 7,8,10,11
    • Processor: Intel Core i5-4460 / AMD FX-630
    • Memory: 2000 MB RAM
    • Graphics: NVIDIA GeForce GTX 760 / AMD Radeon R7 260
    • Storage: 500 MB available space
* Starting January 1st, 2024, the Steam Client will only support Windows 10 and later versions.
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