Mermaids And Pirates Don't Mix (MCAxVocaloid Fanfic)

Okay, this an AU where Ayano and the others are mermaids and pirates and things like that.
!!!!!
There is this world where everything is filled with magic, a place where mythical creatures exist but the most rare ones are mermaids...They're very hard to find because they're at the depths of the sea.

Then there's the pirates, they look for mermaids and lot's of treasure but there's this crew who doesn't care about treasure and just likes to play off but is very very powerful...That crew is the Hiryuu Crew, the crew only consists of 11 boys namely Shintaro, Seto, Kano, Ione(IO), Hibiya, Kuroha, Konoha, Haruka, Mikuo, Kaito, Matthew, and Len.

This crew is very nice and kind-hearted pirates, what if they caught a mermaid...? A Mermaid Princess.

Will they do the traditional pirate way and sell her or just release her? Wait...Why don't we go to the mermaid's point of view?

There are 11 Mermaid Princesses, some of them were kind hearted and some of them is very mischiveous but also nice.

The mermaid princesses' names are Ayano, Mary, Kido, Aria(IA), Ene, Momo, Actor, Takane, Miku, Meiko, Lia, and Rin.

All 11 of them are very curious about the land and gets bored of the sea...And one of them gets brave enough to see the surface...but...A tragedy happened! She was caught! What will the mermaids do? Attack or tell their father? Hard choice...So they decided to just go to the sea witch and ask her to turn them human, I wonder what would happen? Who knows, let's find out~

(I do not own anything, I own my OCs and my plot and nothing else, and also Ione isn't IO's real name, I put it there because...I don't know IO's real name and Ario sounds weird, also I'll be calling IA 'Aria' okay?, ty)