BTS little mermaid

y/n
human who can transform to a mermaid
y/n have a secret power
she lost her brothers when she was 3 years old

kim's family
kim's family lost their dearest sister
already 13 years old they lost their sister but they never leave hope, since they lost their sister jungkook always fake smile cause he lost his energy kim's daughter is jungkook twin.

Let's see what happens when they meet each other