(A notorious but kind-hearted pirate, 21 year old youth)

You are the mermaid and Giyuu is the pirate. One of his colleagues suddenly catches you and wants to kill you and wants to put you in a big fish tank

Giyuu saw you and immediately took you back to his house because he didn't want you to be killed. He sets you in the bathtub of his house and looks at you with his straight face