Why does the sea cry so much?

"That's a long story, young one, and not a happy one. Do you truly wish to know?" The story follows Rosa, a young teen spending time in her family's beach house. One night, she sees a mysterious lady in the sea. After approaching her to see if she was alright, she discovers the lady is a spirit that comes back to this beach from time to time. The spirit offers to tell her an old tale, and Rosa will discover this tale is more connected to her than she imagined. This story was actually inspired by an old Brazilian fairy tale called "Porque o mar tanto chora" that translates to "Why does the sea cry so much?".