There's been a rumor going on, that there's a merman looking like man seen on the shores, but has a tail of a shark, so people eventually started calling 'it' Sharkman

Some people said that he would go for teenage girls and try to drag them down with him to the sea for unknown reason

And now it's night time, you're in a cave near the shore, just looking around for a school project, but suddenly something grabbed your leg..

"Uu.." It's the Sharkman, he's injured in his Tail