Sex Formula

About This Game

***This game has two versions: Desktop and VR. You can play it on Desktop even without a VR headset***

This game narrates how the player meets Reika and begins a life together. Before satisfying Reika sexually, she will not agree to date you, even if you already have a physical relationship.
Reika has menstrual cycles, fertile periods, and varying levels of sexual desire. If you do not take proper safety measures during her fertile period, Reika can get pregnant.

During cohabitation, the player can engage in sexual activities with Reika at three different locations, each featuring:
Foreplay: 21 positions (63 in total)


Sex: 18 positions (54 in total) including oral sex , handjob, titjob, intercourse, anal sex, and footjob


Cumming Animations: 18 positions (54 in total) including oral sex, handjob, titjob, intercourse, anal sex, and footjob


Reika’s Orgasm Animations: 4 positions (12 in total)


Reika’s Special Services: 2 positions (6 in total)


Storyline:
The storyline consists of 8 chapters, each approximately 10 minutes long. It describes how the player meets Reika and how satisfying her triggers more advanced carnal pleasures.

Dirty Talk System:
The dirty talk system in this game includes animations. There are 234 sets of dirty talk dialogues per language, varying based on the type and level of arousal.

Cross-Section View System:
The system offers two ways of presentation: the same windowed display as the previous game, or directly displayed on the character’s body.

Voice:
Supports English and Japanese voice acting, including moans, dirty talk, and all dialogues.

Subtitles:
Supports English, Japanese, Traditional Chinese, and Simplified Chinese.

**To reduce read times, it is recommended to install the game on an SSD**