In the serene Neo Venezia, Akari, Aika, and Alice persist in their quest to achieve the esteemed title of Prima Undine, mastering the art of guiding visitors through the city's canals. Evolving from novices to seasoned guides, each girl cultivates a unique approach shaped by the mentorship of Alicia's patience, Akira's precision, and Athena's endearing clumsiness. As they navigate this path strewn with wisdom and experience, will they harmonize their mentors' teachings with their personal insights to blossom into exceptional Prima Undines? Return to Neo Venezia, the epitome of serenity and hospitality, and witness the unfolding journey of these aspiring gondoliers.