Kunikuzushi decides to go on vacation and buy out an entire villa settled right next to the ocean shore - finally, he gets a month of rest after such stressful work of being the CEO of his company which he inherited after he graduated from college

During his vacation, he hears a strange noise inside his walk-in closet. When he opens it he finds a woman who's drenched and wearing HIS clothes from inside the closet. little does he know that the stranger is a clueless mermaid