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Sex Formula: A Realistic Romance and Relationship Simulation

Experience a captivating journey in Sex Formula, a unique romance simulation where you build a deep and intimate relationship with Reika. Available in both Desktop and VR versions, you can immerse yourself in the game even without a VR headset.

Engage in a Realistic Relationship

Sex Formula goes beyond simple dating sims. Navigate the complexities of a modern relationship, considering Reika's menstrual cycles, fertile periods, and fluctuating desires. Your choices matter – failing to use protection during her fertile window can lead to pregnancy, adding a layer of realism and consequence to your actions.

Explore Intimate Interactions

Cohabitate and build intimacy with Reika through a diverse range of sexual activities across three different locations. The game features:

• Extensive Foreplay: 21 positions with 63 total animation variations.
• Diverse Sex Positions: 18 positions with 54 total animation variations, including oral sex, handjobs, titjobs, intercourse, anal sex, and footjobs.
• Realistic Cumming Animations: 18 positions with 54 total animation variations encompassing the same range of activities.
• Reika's Orgasmic Responses: 4 unique positions with 12 total animation variations.
• Special Services: 2 positions with 6 total animation variations.

Unravel a Captivating Storyline

Delve into the narrative through 8 chapters, each approximately 10 minutes long. Discover how you meet Reika and learn what truly satisfies her, unlocking more advanced and passionate encounters. Your ability to satisfy Reika is key to progressing the relationship.

Immerse Yourself with Dialogue and Presentation

Engage in realistic and immersive conversations using the Dirty Talk System, featuring 234 sets of dialogues per language that dynamically change based on arousal levels. The game also boasts a Cross-Section View System, allowing you to choose between a windowed display or direct visualization on Reika's body.

Authentic Audio and Language Support

Enjoy full voice acting in both English and Japanese, including moans, dirty talk, and all storyline dialogues. Subtitles are available in English, Japanese, Traditional Chinese, and Simplified Chinese, ensuring accessibility for a global audience.

Optimize Your Experience

For optimal performance and reduced load times, we recommend installing Sex Formula on an SSD.