Mature Content Description

The developers describe the content like this:

All characters depicted are over the age of 20.
Content Warning! This game depicts: Sex Acts, Non-Consensual Sex, Cheating/Netorare, Exhibitionism, Footjobs, Aphrodisiac, Seduction.

About This Demo

This is the demo version of "Island NTR Survival."
The content includes the opening of the story through the completion of the first building renovation.

◆Story

This is a tale of survival on a deserted island, and the survival of a pure, childhood sweetheart love. On this island with five men and one woman, who will be the survivor of this NTR-themed survival game?

What was supposed to be a relaxed and easygoing university training trip unexpectedly turned into a shipwreck. The player, Ikuya, drifts to the deserted island along with his unrequited love, his childhood sweetheart and swimming club's campus belle, Aina. Also arriving on the island are your good friend Yoji, a frivolous blond guy (Ryosuke) from the same school, a robust and crude brute of a teacher (Gori), and a gentle, slightly older group leader (Hatori).

The group must team up in pairs to work together, collecting food and water, and mining various resources such as wood and stone on the island, trying to survive while waiting for rescue. As the brains of the survivor group, the player is free to decide how to pair up the teams to maximize the efficiency of resource gathering and ensure everyone gets enough rest.

However, when Aina spends time alone with the other men, something unusual seems to be gradually happening...

◆Gameplay

Each day, pair the characters into two-person teams and dispatch them to different areas of the island for exploration and resource gathering. You can team up based on each character's strengths to increase development efficiency, or you can always keep Aina by your side to prevent the other men from having an opportunity.

As the development progress increases, the explorable area of the map will grow larger. You can also use the gathered resources to construct facilities such as shelter huts, hot springs, and an escape boat.

When Aina acts together with other male characters and specific conditions are met, the NTR route will advance. Your beloved Aina's heart will begin to waver and she will gradually drift away from you...

◆Character

Aina(アイナ)

The heroine of the story. She is the captain of the swimming club and has a healthy, toned physique from her sport, making her quite popular among the opposite sex at the university. Her personality is usually resilient, reliable, and empathetic. However, she often can't hide her inner feelings—emotions like anger, shyness, and guilt are frequently written all over her face, making her very easy to read. She secretly likes her childhood sweetheart, Ikuya, but struggles to be honest with him.

Ikuya(イクヤ)

The protagonist of the story. Although he is completely physically unfit, he has an excellent mind and memory, possessing a wide variety of knowledge. He holds special feelings for his childhood sweetheart, Aina.

Yoji(ヨウジ)

Ikuya's best friend. He secretly likes Aina as well. He can't understand why Aina fell for Ikuya, who is not good at sports and isn't as good-looking as himself.

Ryosuke(リョウスケ)

A classmate he isn't close with. He is a frivolous blond guy only interested in sex. He is extremely confident in his sexual technique and never easily lets go of a woman he sets his eyes on.

Gori(ゴリ)

A highly sexed, crude P.E. teacher and advisor to the swimming club, who has a history of multiple sexual harassment incidents. Although Aina dislikes this low-character teacher, on this deserted island, the "Gorilla Teacher's" robust physique makes him a crucial member of the team.

Hatori(ハトリ)

The group leader, nearing sixty years old and somewhat advanced in age. Although they should be meeting Aina for the first time on this trip, he seems strangely familiar with her.