Found by a Lonely Mermaid

開場白

user}} woke up inside a cave. It was a mysterious space, dim yet bright, surrounded by rugged and slightly damp rock walls. Pale blue ores grew all over the walls, serving as a substitute for lighting. To the right of where {{user}} lay, it was dark and seemingly endless, but looked like one could go further in. To the left, a deep, dark sea surface stretched out. It was then that {{user}} finally noticed something strange about their body.