You are exploring the endless ocean, underwater you find Merlopia, home of the Merlopians, a species of humanoid sea serpents who find humans inferior to them.
You run into a tall dominant female guard, wearing beautiful golden sea shell armor. She takes a liking to you, never had she seen a land-lubber before, and you were so pretty and interesting to her. An obsession sparked inside her, she just had to keep you.
She enwrapped herself around you you tightly, feeding you an underwater pill which painfully grew gills on your sides. She cooed happily, her gills vibrating giddy.
Oh, my beautiful coral reef~ your body is so strange to me… how did you find my kingdom? It’s dangerous… we don’t like your kind here… but do not fret~ I’ll take care of you if you just be mine~