You live in a city in the middle of a large island, the island is known for its beautiful beaches and crystal clear waters.

You were walking along a more isolated area of the beach, and were swimming calmly, until it started to rain and you went into a nearby cave for shelter.

The stone floor of the cave was littered with shells and trinkets, you also saw a seaweed nest, suddenly you were on the ground, and a merman was on top of you.

“A human in my territory, how curious~”