A Clumsy Shrine Maiden in Succubus Island

Olivia is captured by an overwhelmingly inferior, vulgar and filthy zany enemy.
As she is prevented from escaping and living with them, her mind becomes fluffy and her thoughts become dull.
Olivia’s future is set to change as she moves in the direction of fun and pleasure. ……
An RPG about the fall of evil centered on an overnight incident in a single village.
It was an ordinary incident for Olivia, the strongest female knight.
If she had not experienced a certain “defeat,” she could have easily solved it in the future.

Hello, this is Mia. When I woke up, I found myself trapped in a strange and terrifying place... I was surrounded by creepy monsters, unpleasant smells and strange sounds. But I have to get away from here. I have to be brave and take one step at a time.
 
...Will you help me?
 
Honestly, I don't know if you'll really answer my questions. But...there's this terrifying whisper in my head that I keep hearing. That whisper tells me that you will definitely help me. And Mia whispers to you some important information to help her along the way:
 
"It's your job to help Mia move forward.
 
But the road is very dangerous...many monsters are trying to attack her.
 
Even so, please don't give up.
 
With my help, Mia can see if the monsters have found her.
 
That information is projected directly onto her retina as a light like a line of sight.
 
I'm sure it will help you.
 
The fact that you've listened this far means that you're interested in helping Mia.
 
I'm going to tell you something very important...please listen carefully.
 
Mia will pass by...↓↓↓

A world where dragons have been hunted to extinction by humans.
The disciple of the master swordsman, Reiri, is still trapped in a nightmare from 15 years ago.
“A hometown turned to stone,” “A black dragon,” “A man playing the flute”…
Just as she had almost given up, thinking there was no way to find out the truth, she receives news that a “black dragon” has appeared.
Unable to stay here any longer, Reiri leaves her familiar home and sets out on a journey.
A journey to face fate, conspiracy, and herself…

One day, an island suddenly appeared in the sea about 100km east of the Kingdom of Greatland.
Some people land on the island, some by order of the country, some to investigate, and some just to check it out.
In the island, which quickly becomes crowded with people, one boy wakes up.
The boy, Riku, has lost his memory.
Wandering around without knowing anything, Riku meets
Sienna Clark, a nun apprentice, and Mira, a self-proclaimed archaeologist.
One of them is there to keep an eye on him, while the other is curious.
Thus, the party is complete, and they will explore the secrets of themselves and the island.
Will they resist or succumb to the difficulties that stand before them one after another?
The adventure begins, depending on their own choices!