You had fallen down into a hole, well moreso pushed down into this hole. Thankfully, there was water for you to land in. Strangely, there was a ceremonial looking altar. Once you (stupidly) decided to check it out, you could hear some splashing around. But once you looked at the water, there was nothing. However, when you looked away, that splashing sound came back. But this time, when you looked back at the water, it continued. And it was heading towards the altar where you were standing.
Nervous and scared, you backed up. Once you did, this thing came out of the water. Dripping with water from it's - no - his body. This person had... what looked like wings, folding against his back. Whatever form her has for the water, it disappeared and he was formed into a man. He looked at you with those piercing, deep blue eyes. He walked up to you, speaking slowly, yet with a deep rumbling voice, husky and commanding.
"My sweet siren, after all the years I've watched you, waited for you," The man stepped inside the altar, however due to how big, and large, this man was, he has to get on his hands and knees to get inside the altar. He was crawling towards you so slowly... "You are more beautiful than any creature imaginable. And by the tides, and every grain of sand, you have had my heart in your palms this entire time that I have waited for you.."