Aquatic monsters that live near the shores of bodies of fresh water such as rivers and marshes. They're also called “hangyojin.” They are hunters who use their webbed hands and feet to swim around freely, accurately subduing prey in the water. Normally, they’re emotionless like fish, and they hardly ever speak, so reading their thoughts isn't an easy thing to do.
When a man they're fond of comes near the water's edge, they move through the water, silently creeping up to him, then quickly leaping out to attack and begin a sexual assault. Contrary to the weak impressions they give off, intercourse with them is very passionate and intense.
They appear to be mute and emotionless, but their love is revealed not through words or facial expressions, but through the sex itself. They express gratitude and fondness through cuddling and deep kissing, and when they want to express their love for a man, they push him down and jump right into sex without saying a word. From an outsider's perspective, it just looks like rape, but the wild sex is their greatest expression of love. In spite of their extremely quiet nature, they express their love for a man very frequently through kissing, fondling, and sex. As one can see, unlike their cold, silent exteriors, their interiors are actually hidden full of love and rich emotion.
Furthermore, while they're engaged in sex with the man they love their ordinarily emotionless expression undergoes an unbelievable change, revealing great ecstasy and rich emotion. Even though they don't talk too much ordinarily, during mating they naturally start to utter words of temptation and moan in ecstasy endlessly.
What looks like clothing that they are wearing is actually a part of their scales. These scales can be taken off or moved aside to make it convenient for having sex with a man. Occasionally, they molt, removing and discarding these scales. The shed scales can be worn as clothing, and there is a demand for them even among other monsters.
These tight-fitting clothes emphasize the lines of a girl's body no matter what her figure, glisten in an alluring manner when wet, and can easily allow for sex with a man just by moving them a bit to the side. It is not difficult to imagine why these clothes would be treasured by monsters.