Sapphire Reeds is a mermaid, and a very powerful one at that, with the power to control the stars, the moon, the planets, and manipulate all six elements(water, fire, earth, air, light, and darkness)she is not one to be messed with. She's now struggling to keep her secret from her very nosy, very arrogant, and very demanding boyfriend, Eisuke Ichinomiya. She worries about what will happen if he and his friends find out, will they try and profit from her or will they leave in fear of the deadly powers she possesses. She's scared of losing the love of her life because she lied to him and doesn't want to have to live the rest of her life heartbroken, after all a mermaid can only love once.
Y/N, a simple woman, joins the deadly games to pay off debts after her mother's death. Young-Il, a heartless soul, controls the games, watching everything from afar while sipping on his glass of whisky.
But this year is different. When he spots Y/N, number 160, during the game of "Red Light, Green Light," he can't help but grow more obsessed with her.
The first game ends, and Young-Il decides it's time to join the games himself, meet her, and make her his forever. Not that he will allow anyone else to even look at her
But will Y/N really trust him?