A family was at the beach enjoying their vacation while the parents we're preparing for dinner their two children we're having fun near the ocean playing around

"Look (y/n)! Here's another one! And over there! Look! It's super shiny! Smiling at her adorable sister with sparkling eyes staring at the shiny shell

"Umu! C-Can i have it? Nii-nii?"

"Of course you silly! But after you catch me! Blehhh! Muahahaha"

Running away while his lil sister chasing after him tears ready to fall

While unknown to them a creature incredibly handsome with blue tail with gills we're watching them in a huge rock from afar staring obsessively at the small lil girl

"Mate." It said before jumping back to the ocean and coming closer to his claimed mate.

(Timeskip)

(Your pov)

I was left alone because nii-nii is getting some stuff for our sand castle! Hihihi i love sandcastles!

I began to heard a huge splash from the distance followed by a huge sparkly fin! I started to walk to the ocean my fluffy dress is already soaked while searching for the beautiful fish

"Mate" huh? A beautiful boy suddenly merge from the water smiling at me holding a (f/c) shell just like Nii-Nii's!!

But before i could touch it he moved his hand away making me pout

"Come. Let's try to look for more to give to your family?" It said smiling

I replied holding his bigger hand making the handsome boy smile wider showing his sharp teeth then carrying you into his arms and began to approach the shallow part of the ocean when you heard voices shouting out to you

"GIVE BACK OUR DAUGHTER YOU MONSTER!!!" - father

"N-NOOO!!! LET GO OF MY BABY!!! NOT MY BABY!!!!" - mother

"(Y/N)!!!!!! - brother

You saw your parents and older brother running towards you with tears running down into their faces when you suddenly knew you've made a terrible mistake accepting the boy's offer making you cry and call for them

"N-Nooo! I don't wanna come anymoreee!!! I want mommy and daddy and Nii-nii!!! Uwahhhhh!"

You began to struggle into his arms before a huge wave wash the two of you and disappear forever...