Sex, a maid, and a Desert Island

A family of four—including the protagonist’s father, his new stepmother, and her daughter, Yuzuha—sets out on a trip together for the summer holidays.
During the journey, an unknown virus breaks out on board the ship, causing a wave of illnesses. While everyone is confined to their cabins in fear, a secondary disaster strikes: the cruise ship capsizes. The family members are separated as they are swept into the sea, but in his fading consciousness, the protagonist manages to grip Yuzuha’s hand tightly.
When he wakes up, he finds himself on an island surrounded by nothing but the ocean. Dazed, he soon spots Yuzuha nearby. He rushes to her side to check on her safety; fortunately, she is uninjured and fully conscious.
And so, their survival life begins—just the two of them, alone…

One man and three women are stranded on a mysterious deserted island after a yacht wreck. The island is filled with ancient ruins and strange, magic-like powers. Amidst a scarcity of resources, a tale of sexual entanglement, mystical exploration, and tool crafting unfolds. It is an adult adventure where desire and survival intertwine, leading to a final choice: escape or eternal descent.
Gameplay
Exploration & Gathering: During the day, venture deep into the map, avoid beasts / hunt via QTE, collect materials to craft tools (fishing nets, shelters, ship parts).
Resource Management: Allocate food / stamina, upgrade camp, increase survival rate.
Girl Interactions: Raise affection through quests (e.g. hand-weaving, trap-making), trigger side stories. Unlock intimate H scenes (blowjob, titjob, cowgirl, bondage).
Goal: Accumulate resources to build a ship and escape! Balance survival and H, explore the entire map.
Multiple Endings: Full affection harem, solo romance, extreme heavy queen corruption…… High replay value, Adult survival simulation, passion and survival intertwined, conquer the island and their hearts!

The protagonist and his childhood friend, Nanami Mitsuki, get caught in a storm during their trip and are stranded on a deserted island.
As they live with the goal of simply surviving, their sexual urges gradually build up…
To relieve those urges… they start helping each other masturbate!?
Will they be able to build a boat and escape the island without being consumed by their desires…!?

The time is the near future.
Due to the effects of a pandemic, the world’s male population has drastically decreased. With birth rates plummeting and the continued threat of human extinction, there is much clamor about the crisis—
Around this time, you move to Kawashima (交島), a single-town island floating in the southern seas off Seisui Prefecture, where your grandfather has an empty house. It is an isolated and desolate countryside town, but it is home to an academy designated by the country as an educational leader.
You are moved by meeting classmates of the same sex, something you’d never experienced before. You become accustomed to interacting with the unique girls and your self-sufficient life after school.
Then, during a class one day, the health teacher, Hirari-chan, announced abruptly without even a proper greeting:
 
“Starting today, you will all be having sex!”

It’s a “Deserted Island Survival ‘Harem’ SLG” featuring an ordinary male office worker who ends up stranded on an uninhabited island together with three women from the same company.
In the midst of beautiful nature, search for food, gather driftwood, craft tools, and survive by cooperating with the heroines.
The island’s liberating atmosphere and the ever-present fear of death gradually drive their sanity to the brink. Once the women’s sexual urges are ignited, their desires grow uncontrollably and are directed toward the island’s only man.
There are no laws or prying eyes to suppress lust on a deserted island.
You play as the protagonist, Takumi Shimamori, and as the norms of civilized society crumble, build your very own harem.