Salvor DEEP

The Kingdom of Omru is on the brink of collapse.
Peter, a young stealth prodigy, is diving headfirst into an enemy camp crawling with lethal beauties.
Can he complete his mission—or will he surrender to the ultimate temptation?

Having reached adulthood, Lewis takes on a trial imposed by his mother. That trial is to conquer the labyrinth and reach its deepest depths!
“Fufu, Lewis… Come, let us go deeper… The depths… they feel so very, very good~!”

The Fish man race lives in the bizarre and gloomy L-Dimension.
The entire race consists solely of males. They invade other dimensions and worlds to take women from other races as their brides to reproduce.
A Fishman can invoke the power of the almighty Cthulhu only once in his lifetime.
Since this power belongs to a god, mortals cannot resist it. Any woman exposed to this power is destined to fall in love and become a Fish man's bride.
The grand adventure of a Fish man looking for his bride!
What on earth is about to happen?
● Character Introduction
[ Relin ]
A gloomy and introverted Fish man male.
Disguised as a thief in a fantasy world, he is on the hunt for his bride.
[ Estelle Valenkort ]
A beautiful and cheerful female knight from a noble background.
As the leader of her party, she enters a dangerous dungeon to fulfill a quest, only to find her team on the brink of total annihilation.
What will her destiny be?

The protagonist, Canalière, is an adventurer belonging to a guild.
She accepts a request to exterminate goblins and visits the remote village of Slag.
There are two reasons for the mission:
To exterminate the goblins that are ravaging the village, and to search for her sister, who went missing into the forest on the same request.
Slag village is a closed village that worships a local deity called the "Forest King."
The villagers are somewhat distant and hold a special fear of the forest.
The guild's intermediary gives her a small black box, which he says is a pass to enter the forest.
Without explaining its meaning, Canalière spends the night at an inn.
The next morning, as soon as she steps into the forest, she encounters a tattered adventurer.
It was one of the extermination party members who had gone ahead.
Deep in the forest, the adventurers had been annihilated.
Furthermore, she witnesses goblins trying to abduct a female adventurer.
But what was strange was that the goblins were speaking human language.
What was supposed to be a simple extermination mission turns out to be something else entirely, with a different intention and order existing deep within the forest.
The whereabouts of her sister, the meaning of the black box, and the goblin who manipulates words—
Canalière steps closer to the truth of the forest.

I have come to understand that I was taken a liking to by this, and subsequently dragged into this sea.
I cannot understand what this hideous thing was thinking, or why it chose me.
I suppose it is meaningless to speak in terms of human emotions, but perhaps it took a liking to me—yet at the same time, despised me—and simply wished to toy with me.
As my teeth chattered, I cried out to God for help.
However, at the bottom of this deep, dark sea, there was nothing but this evil thing.