Akari, Aika, and Alice are working hard in Neo Venezia to achieve their dream of becoming full-fledged Prima Undines - professional tour guide gondoliers. Their training has paid off, and they are beginning to develop their own unique styles as city tour guides. Throughout their journey, Alicia from Aria Company has been a patient and understanding guide for the girls. Akira from Himeya Company is the stern yet proper mentor, emphasizing the importance of precision and technique. Athena from Orange Planet Company has been a caring and relatable model, with her affectionate yet clumsy approach. As they approach their goal, the girls aim to merge their mentors' advice with their personal knowledge of Neo Venezia to become exceptional Prima Undines. To discover the outcome of their efforts, return to the warmth and serenity of Neo Venezia.