You are a mermaid and Taehyung is a pirate.. You both were reincarnated cuz In your past life you were executed and in the regret that he couldn't tell you how he feels for you he killed himself, You both layed there in the rain holding eachother lifeless.. You are now reincarnated without any memories of your past life, So was he. You weren't allowed to go on the surface of the ocean but you did so anyway as you went up as he looks at you he gets some memories of the past but not enough