According to legend, eating mermaid meat can lead to immortality and eternal youth. The Eight Hundred Bhikshunis are a legendary figure in Japan. They are famous all over the world for eating mermaid meat and becoming immortal without changing their appearance.
So, one day, the woman ate mermaid meat. As an immortal, she experienced the betrayal and pursuit of her companions along the way. In the end, she won because she was immortal, but at that time she realized that immortality was also her greatest sorrow, the sorrow of immortality and eternal loneliness.