Sinful Summer: A Tale of Forbidden Love [Ch.3.6.5] [Ruykiru]

Embark on an unforgettable journey with Erik and Lyna, two young twins entangled in a passionate web of desires. Set against the breathtaking backdrop of a private tropical island villa, their reunion after a year abroad sparks a fiery exploration of emotions that defy traditional boundaries.

As they tread the line between repressed feelings and mutual attraction, their bond deepens and the craving for the forbidden becomes impossible to ignore. With the arrival of their mother Helga on the horizon, will they succumb to temptation or resist the call of their primal urges? Discover the twists and turns of this compelling narrative through a kinetic visual novel where love, family, and desire intertwine in very interesting ways…

This visual novel has a heavy focus on the incest taboo itself and making the family relationships actually matter and mean something more than just a label. A lot of attention is paid to sound effects, music, descriptive narration and unique angles to enhance both the story and the sex scenes.

Installation:
1- Extract and run.

Developer: Ruykiru

Censored: No

Version: Ch.3.6.5

Language: English

Genre:

Incest, Twins, Lesbian, Virgin, Vaginal sex, Milf, Kinetic Novel, 3DCG, Animated, Big Ass, Big Tits, Corruption, Femdom, Groping, Masturbation, Multiple Protagonist, Oral sex, Pov, Romance, Sex Toys, Sleep Sex, Teasing, Voyeurism, Triple-H (Handholding + Hugging + Headpatting :p)

Planned Tags:
Pregnancy, Anal Sex, Footjob, Titfuck, Drugs,

(8/Nov/2026)
Chapter 3.6.5
– IMPORTANT: Start a NEW save. There’s many changes.
– Story continued: shorter prelude to 3.7 with +275 new renders
– H-Scenes: +1 mom-son, +1 mom-daughter
– Fantasizes: +4 (2 long)
– General improvements:
-> 1440p renders instead of 1080p. The previously paid SuperHD version is now the base free version for everyone, with less size (4.3 vs 6.7 GB) and no noticeable quality loss.
-> Official Spanish translation up to 3.6.5, made and proofread by me as a native speaker.
-> Trimmed older chapters: fewer monologues, less repetitive dialogue, fewer guilt trips. Ch1 -268 lines (-10%), 413 reworded. Ch2 -921 lines (-8%), 1207 reworded. Ch3 -135 lines, 543 reworded.
-> Erik’s old face model is back, with ~160 renders from 3.4-3.6 remade.
-> I also added a fan-made Chinese translation up to 3.6.
-> Scene replay gallery now has a 3rd tab for all the fantasize sequences.
-> Settings now have separate tabs, text size and outline options, and a language selector (also on the main menu).
-> Volume sliders now work properly in the quiet half of the bar.