Akari finds herself nervous coaching a new undine as a Prima, until she awakens to find that it is just a dream. To soothe her worries, Alicia recalls stories of her beginnings as a Prima, as well as the memories she made.

Now that Akari Mizunashi is a Prima Undine and head of the Aria Company with her own apprentice, Ai Aino, she can't help but reminisce about her time as a Single. She has new responsibilities and much less time on her hands, but these changes bring with them new forms of miracles that Neo Venezia can give. Growing up into new roles is hard, but Akari can always count on the friends she's made on Aqua in times of need.

The last movie of a four-part finale of Tamayura.

As Fu and her friends begin their third and final year of high school, the photography club gets two new members; freshman Takumi Shindou and sophomore Suzune Maekawa. Thinking about what to do after graduation, Fu decides she wants to pursue a career combining photography and travelling. Afterwards, Fu's family tell Fu about the time she took a picture of her father and first learned about "tamayura" from him. Later, as Chihiro and Tomo pay a visit for the Bamboo Festival, announcing that they plan to study abroad after graduation, Fu is shocked to learn that Riho is planning to leave town. During the festival the next day, as the girls get to see Kanae as part of Sayomi's explorer's club, Fu is approached by Riho, who explains she is going to Tokyo to open a gallery with her friend. Thankful for everything Riho has done for her, Fu promises the carry on her torch in pusuit of a career in photography.

The third movie of a four-part finale of Tamayura.

The season is fall and the city of Neo-Venezia is covered in fallen leaves. Something is bothering Anya, who works at Orange Planet. Her senior colleagues Alice and Athena haven't seen each other due to their busy schedules, which is making Athena feel sad. But for some reason, Alice seems to be avoiding her altogether. With her friends Ai and Azusa's help, Anya tries to find a definitive way for Alice and Athena to get together. But during this time, Anya learns of a situation that only she can see because of where she stands.

Neo-Venezia has reached a long winter. Ai, Azusa and Anya, who were practicing jointly in the cold weather, visit the Undine Museum, led by Akira who seems not her usual self. At the museum, the trio meet its director, Asuka who is Akira's senior known as Himeya's legendary undine. The two of them are the successors to a gondola that has been carefully passed down since the founding of Himeya Company. However, Akira reveals that Aika, who is expected to inherit the gondola, has no intention of doing so. Azusa, who is not convinced, tries to find out why.