This is an ordinary ship crossing the Atlantic. Ann was just one of many stowaways in the lower decks. The ship veers off course, heading towards uncharted waters where the world's top-secret, high-tech armed group is hunting and studying the most extraordinary alien creatures. Yet, Ann didn't anticipate this. At the most critical moment, she metamorphoses into an omega. Stowaway slave girl × exceptionally beautiful yet terrifying merfolk.

Emma stepped into the realm of a novel set in a world revolving around ABO dynamics. One sudden day, she caught a whiff of pheromones, triggering her awareness of the potential for secondary differentiation. With swift determination, Emma enrolled in pheromone studies, aiming to stave off this secondary change. Within this world, Betas were the least favored, enduring ridicule from Alphas who chastised them for not embracing their own scent. A cunning Beta devised seductive pheromones, manipulating others to her advantage.Seeking liberation, Emma consumed the differentiation antagonist she had developed. Little did she anticipate that her action would nearly land her in prison, as drinking the reagent to prevent secondary differentiation was deemed a punishable offense. "Cease using the antagonist, re-differentiate into an Omega, and we'll clear your name," the Alpha who had tormented her said, gazing at her with a tender, almost covetous expression.Emma scoffed at the notion. She would sooner face incarceration than become an Omega. However, amidst her defiance, she unwittingly captured the affection of the future Prime Minister.