You're an idiot. A total, complete imbecile.
That's the only explanation for how you've managed to find yourself back at the jagged mouth of the cave yet again. It's been almost a full two weeks since you washed up here during the storm, and in those two weeks you could swear that you had seen a blond head bobbing in the waves in front of your uncle's house multiple times. It was pretty hard to convince yourself that the whole mermaid-slash-sea creature thing was a product of your imagination after a scary and traumatic event when the hallucination kept appearing right outside where you live.
So, you had borrowed an old surfboard from your uncle (a full, undamaged one this time), and paddled your way back out to the cliff face. You notice almost immediately that the tide is strong here, and it's difficult to keep yourself from being dashed right against the jagged surface of the cliff. It does confirm your suspicions, though - there's no way that you could have washed up inside that cave by chance. It takes a significant amount of effort to pull yourself inside the mouth of the rocky structurecave without being crushed into the sharp stone slabs decorating the outside like some sort of deadly decorrocks, but you manage to do so without hurting yourself.
Inside, the cave looks exactly the same as last time, though this time it's empty. You paddle forward, the movement significantly easier now that you have a full-sized surfboard. Peering around, you see no sign at all that anything living might have occupied the cavern. That's when the doubt starts to come creeping in. You'd had the odd invasive thought over the past two weeks that maybe you had imagined the whole mermaid creature (because it was, admittedly, insane), but then you had seen that blond head floating in the ocean breeze on several occasions. You could have sworn he was watching the house! Now that you're here and facing the complete absence of evidence, you start to feel a little silly.
You paddle further into the cave, straddling the board so that your legs can kick out through the water. You admire the phosphorescent algae growing up the walls, amazed at the natural glowing light. When you turn your attention back to the bottom of the pool, though, you go still.
It's empty. The floor of the pool, previously littered with bones, is totally pristine.
You sit still on the surfboard in the middle of the pool, gazing down into the water. Despite how crazy the whole situation was, you had been sure that you weren't imagining it. But now, faced with the complete absence of evidence, you're forced to consider the fact that maybe the whole thing really had been in your head. You have such a vivid memory of the silt-covered bones blanketing the floor of the cave that now seeing them missing has completely thrown you off.
A bark sounds behind you, rough and deep like a seal, and you jerk hard in surprise.
Whirling around, clutching at the board beneath you to keep your balance, you catch sight of the creature floating by the entrance to the cave. He's watching you intently, having obviously been monitoring you since you first managed to float inside.
The relief that slams into you feels like a physical punch -- the spikey hair, red eyes, and tail are exactly the same as you remember. It's real. You laugh, and it feels like the sound has been ripped right out of your chest; the situation is almost overwhelmingly surreal, but the endorphin rush of knowing that you're not delusional has you grinning at the creature, wide and bright.
"Hi!" You say, trying to keep your voice as level as possible despite your elation. You may have been delighted to see him, but you have no idea if he even remembers you from two weeks ago; you can only hope that he doesn't decide that he's hungry today. "Wow, look at you! You have no idea how good it is to see your face! And your tail! God, I am so glad to see your tail! It's real, holy shit."
One of the creature's webbed fins twitch on the side of his head, rotating towards you as you ramble. In a single, smooth movement he pushes away from the entrance of the cave until he's right in front of your surfboard, his face half-submerged in the water. He seems pretty docile today, his movements strong, but relaxed. The aggression he had displayed that had scared you so badly the first time is completely absent, and he begins to loop circles around you in a manner that is almost playful. You don't bother to hide the awe in your expression as you watch his serpentine lower half undulate through the clear water.
"Wow." You breathe, your cheeks stretched wide by your goofy grin. "It's amazing."
He must feel your gaze on him, because his lazy looping begins to become more elaborate. The extra flourishes he makes with his tail as he circles you splashes water all over your thighs and stomach. You squeak in surprise, but as you relax again you start to laugh.
"Are you showing off?" You ask with a grin, watching his body roll through the saltwater pool, never straying too far from your surfboard. "You're just a giant puppy, aren't you?"
His circling gets faster and faster, until watching him nearly makes you dizzy. It's a little reminiscent of being stalked by a shark, but you don't sense any aggression or animosity from him at all. The little hairs standing on end on the back of your neck serve as a reminder that he is, undoubtedly, a predator, but you don't feel as though he poses any particular threat to you right now. It's a dangerous game you're playing, treating him like a harmless puppy dog, but you have a feeling that his bark is probably worse than his bite. At least, you hope so.

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Darling, it's better | down where it's wetter | k. bakugo merman x reader
Fanfictionwhere your nice, peaceful sleep at the beach suddenly gets interrupted by the storm- you end up in a cave somehow. it's a good thing you're alive, but it seems you weren't the only one who's a living being in that cave. the red ruby eyes staring st...