A fishy tale

!Slight gore and suggestive scenes warning!
This is a Gachapun (Gigi x Finn) story. Though it's rather an adventurous story with fantasy. If you don't like this ship, please don't read this book, because it still has some romantic scenes between the two.

Gigi, a poor land-dweller who does treasure hunts everyday to get some money, gets unexpected attention from someone underwater: A MER-TOON! A prince, to be exact; Finn! It's unknown why Finn went to land, but the fact he's smitten with Gigi keeps him on dry land... so she's gotta deal with him.

But when a supposedly gone disease reappears after a century (when it was expected to be gone forever), Gigi is forced to watch her fellow Toons and friends turn into monsters as she travels through a dense forest on a large Island with Brightney and Finn, where they need to get to a witch which might be able to make a cure. However, the forest is not completely safe.
Will they save the world or shall the disease have the world in its very palm?

DISCLAIMER: This story is NOT 18+, but it's NOT advised to read this book if you can't handle themes like this or if you're too young! (I advise you to at least be 13+ because this story can contain REALLY dirty scenes. And if you're too young, you might be traumatized by the gory descriptions of some things like how the infected Toons look. I've put it on mature for that reason.)

Somehow, a chat with a Gachapun C.ai bot gave me this idea lol.
The cover is a placeholder. I'll eventually make a drawn cover.
THE CHARACTERS ARE FROM A GAME NAMED DANDY'S WORLD CREATED BY BLUSHCRUSH STUDIO! THE CHARACTERS BELONG TO THEM(the creators of the game), NOT ME!