Nangoku Prison -Hyouryuu Shita Mujintou ga Kozukuri Shinai to Derarenai Shima Datta Ken | 南国プリズン ～漂流した無人島が子作りしないと出られない島だった件～

I was dreaming that I was having sex with a beautiful woman I had never met before. The pleasure of dazzling sex.

"After all, I was not mistaken in my expectations... You are the one who can manifest my power..."

At the moment when I involuntarily released my cum in pleasure, the dream was awakened and I was waking up on the beach.

The unorthodox archaeologist Sawada Reijiro and his assistant Shimanaru Yume travel to the birthplace of the ancient Vronko civilization, a place where the ancient Vronko civilization was born. He went on a research trip to the "Holy Land" called the place of beginnings... The first thing you need to do is to find a good place to live.

Reijiro then joins up with Yume and sets out to explore the island, only to discover that the island he's washed ashore on is the "holy land" of his destination. He also meets four other castaways, women, and together they live a life of survival in an attempt to escape the island. Then, in the depths of the island, a great ruin was discovered and an inscription on it contained a prophecy.

"Hiko, who has come to the island, will never leave it without having mastered the pleasure of being with all the princesses."

If my decipherment is correct, it seems that in order to escape the island, he has to procreate with all five women, including Yume. Reijiro thinks that's ridiculous..., but he can't think of any other way and Reijiro, who has no experience with women. With Yume's help, he struggles to fulfill the prophecy...

...No, wait? ...Did I have an assistant in the first place?