Game of the Insane (Yandere Haikyuu!! x F!Reader Oneshots)

Mermay Day 12: Shark Tooth

Pairing: Yandere! Tendou Satori x F! Reader

WARNINGS: yandere themes, mershark Tendou

Note: These are all going to be short. Please don't complain.

The shorelines of your town were barely touched.

Maybe people on the island took the beach for granted, or maybe they only really felt like going to the beach in the summer. Either way, during the winter, the untouched sand and tide was a perfect place for beachcombing.

Tourists would arrive come summertime, and you would be ready for them with handmade seashell necklaces and bracelets, freshly cleaned conch shells for hearing the ocean sounds, polished rocks, and little trinkets that the island visitors just couldn't get enough of.

You picked a good time, while the tide was out, and quickly grabbed your little beach basket, hurrying down to the beach. Sure enough, you were here alone, not a person in sight.

Just how you liked it.

Today, the sand held many treasures. You found in-tact sand dollars, pretty shells, small hermit crabs that you'd soon be painting the shell of, and... what was that?

You bent over and picked up the strange object. Immediately, you could tell that it was a rare find. A shark tooth- black at the top and pearly white at the bottom. The edge was serrated in a way you'd never seen before.

There was a possibility of turning this into a necklace with the shark tooth as the centerpiece but, for some reason, you felt like this was something special. Something you didn't want to sell. You slipped it into your pocket and resumed beachcombing, putting the rest of your findings into the basket.

After a couple hours, you returned to your shop, placing the many seashells and other finds in a much larger basket and the hermit crabs in a little tank. You had found quite a few beauties, but it wasn't nearly enough to satiate the crowds that flocked here in the summer.

The next day you returned. As soon as you began collecting shells, you felt a presence appear. You looked up and down the beach, but you saw no one. The feeling that someone was watching you was overwhelming.

"Yoohoo!"

You jumped about a foot in the air. You looked behind you, but saw no one. The call came again and you slowly turned your eyes to the sea.

A man with wild red hair and piercing red eyes stared at you from the ocean. A shark's fin stuck out from his back and you could see a shadow of a tail moving back and forth.

"Hello, little thief!" he called out, waving cheerily.

You stared at him, jaw slightly ajar in shock. You rubbed your eyes, expecting him to disappear like a mirage. He didn't.

"Found something yesterday, didn't you?" he said in a sing-song voice, "Something big, pointy, mine."

Your hand instinctively went to your pocket. The shark tooth... belonged to him?

"You saw me?" you asked softly.

He laughed loudly, "Of course I did! I was waiting for someone to pick it up. And you turned it over in your hands so sweetly, so romantic!"

"I- I didn't realize it belonged to anyone," you stuttered.

"That's okay," the man said, "You kept it. That means you wanted to keep a part of me. I'm flattered."

"I can give it back," you said shakily.

"Mersharks drop their teeth when they look for a mate and the first person to pick it up, no matter the species, becomes theirs. Becomes mine." He grinned a sharp-toothed smile, "How romantic!"