Anya Dostoyevskaya, a hopeful Undine at Orange Company, becomes disheartened upon discovering that her mentor, Alice Carroll, is neglecting her own mentor, Athena Glory. Athena, the former Undine now pursuing opera, struggles to set up a meeting with Alice, who appears to be avoiding her without explanation. In an attempt to mend this rift, Anya enlists the help of her fellow Undines, Ai Aino and Azusa B. McLaren. Together, they endeavor to reunite Alice and Athena, leading Anya to a profound understanding of her mentors' emotions, offering a potential resolution to the mystery shrouding their relationship.