You absolutely did not expect this, that's for sure.
You only frequented your local swamp to collect shiny rocks, that for some reason were always placed in a way leading further into the pond.
One day, you tripped on a branch in the water causing you to go face first into what you thought was going to be the soil underwater.
When you opened your eyes, you were in a dimly lit.. throne room? Moss covered rocks, algae and puddles of water all over the floor. Was the carpet itself made of literal moss? You look up from your knees, finding two queen figures seated in thrones with crowns made of sticks, jewels replaced by those shiny rocks you collect.
"Ah, a bride for our lovely little Hirudinea.." The second queen croons, approaching you. What dragged behind her was a tail, but it was the bottom half of a leech?
You see the princess, a fairly young woman, grey skin, absolutely flushed in the face as she looks at you with wide, longing eyes.
The queen in bery royal algae suit helps you to your feet, flashing her three pointed leech teeth.
"Yes yes, you will do nicely. What is your name, young lady?"