Her Merman - Her Captive.

Scarlet Larin, a 22 year-old millionaire working as an assassin for the deadliest company in the organization. But even tho she may be praised she has been keeping a secret from everyone in the bathroom of her beach house which no one is allowed to enter.

Aaran Casper, a 25 year-old merman who has been the captive of Scarlet for a few weeks now has been stuck in the tub of her beach house, his hands being cuffed to the sides of the tub making it impossible to escape, only being in a dimly lit room with the water in the tub, he's visited by her everyday at night.

But what happens when the two make a deal?