One morning, Akari wakes up to find the entire city flooded with water! It's the Acqua Alta, a once-a-year phenomenon where the water levels rise, causing all of Neo-Venezia to shut down for a day. But while most people spend the day relaxing, Aika's mentor Akira is as strict as ever, and yells at her to get back to training. Aika has just the solution to get her mentor off her back: she's running away to the Aria Company!

While training in a particularly tough stretch of water, Akari and Aika meet girl from Orange Planet who seems to be having no trouble at all. Her name is Alice, and she's famous for being one of the youngest yet most talented Undines in Neo Venezia. There's just one problem... she never seems to smile. What could she learn from a day spent with the unlikely pair of Akari and Akatsuki?

Akari and President Aria are wandering through the marketplace one evening, when President Aria suddenly leads Akari to a plaza she's never seen before. There, a little girl with a bell around her neck gives Akari a letter, and asks her to deliver it. It seems very important. But if Akari's going to have any chance of keeping her promise, she'll have to enlist the help of flying messengers known as Sylphs!

When Akari was little, she was certain that Neverland was a real place. As she grew up, she understood that it was fantasy... But now, she's received a mysterious, hand-written invitation to visit Neverland for herself! What awaits her as she follows her map toward a quiet, deserted island?

Alice is in a pretty bad mood. Her dorm doesn't allow pets but she's secretly taking care of a kitten; her mentor Athena is an absolute clutz; and to top it all off, she has decided that her left hand isn't as skilled as her right hand, and is therefore useless. Though Alice certainly does have a strange set of problems, and they all seem separate from each other, she's certain to discover that the answers to each all are connected.

Akari, Aika and Alice are scheduled for a full day of training with Akira, and what's more, two customers will be along for the ride. They're a couple on their honeymoon; but while the wife loves Undines and riding on gondolas, the husband thinks being an Undine is simple work, and couldn't really care less about the whole thing. It's up to Akira to teach everyone what it means to be an Undine - Undines-in-training included!

Winter has come - the mornings are crisp and cold, and it's hard to get out from under the covers to go practice sculling. So as a special treat, Alicia suggests that they visit a hot spring! Akari's never seen one before so she's excited to go, and all the others decide to join in as well.

Aria Company has no bookings on a snowy day, so Akari and President Aria visit the oldest bridge in Neo-Venezia. When they reach the other side of the decrepit covered bridge, the snow is gone, and the women she meets on the other side has no idea what an undine is. Together they wait for the terraformers to send water under the bridge for the first time.

Two wonderful things have happened: it's time for Neo-Venezia's annual Carnevale, and Ai has come back to Aqua for a visit! As Akari and Ai wander through streets full of bright colors and beautiful masks, they catch a glimpse of Casanova, the mysterious master of ceremonies. Who is the man behind the mask? The two are curious, but they'll need to be careful. You know what they say about curiosity and the cat, after all...

The mailman's gondola is being repaired, so just for today, Akari is making the rounds with him to get the job done. As she learns the ins and outs of what it means to be a mail carrier, she meets a boy who needs his letter delivered at any cost. Whatever the envelope he's holding contains, it's very close to his heart.

While practicing one day, the girls see President Aria in his own little gondola. But he doesn't see them... instead, he disappears down a canal that's normally closed off. According to Alicia, there's an old legend on Manhome that tells of the Kingdom of Cats, a strange realm that people aren't allowed to enter. Could such a place really exist?

Summer is blazing in Neo-Venezia. The days are so hot that Akari is starting to see things... One minute, she's walking down a crowded street, and the next, everyone is gone. Following President Aria in a haze, Akari wanders into a mysterious cafe, with a very unusual clientele... Later, the girls all decide to buy Nightshine Chimes, delicate little wind chimes with a glowing bead inside. The glow only lasts for a month before it fades, so Akari decides to make the most of the time she has.

When Akari takes her gondola in for a routine inspection, she's given some startling news - the repairman tells her that the gondola is now too old and worn for tourism use, and should be sold off for hauling cargo. Although she at first resists, Akari knows that the repairman is right; so she decides to travel with her gondola to all the wonderful places that she's been, as a way of saying goodbye.

On the night before her old gondola is set to be taken away, Akari and Alicia decide to have an evening picnic out on the water. As they laugh and talk, Alicia tells her stories of the gondola, and how it was an important part of her life as an apprentice, as well.

In the still of the night, Akari is woken up by the distant sound of a train. But Neo-Venezia's trains don't run at that hour, so what was it she heard? And to make matters even more mysterious, the next day, President Aria gifts her with a train ticket. It would seem Akari is about to have another brush with the secretive spirit, Cait Sith...

As snow softly covers Neo-Venezia, Akari and Alicia are out for a walk. Akari asks Alicia what she thought as a child - back then, what did she want to be like when she grew up? But in response, Alicia just begins to roll a ball of snow on the ground. As they walk around the city pushing the snowball, it grows bigger and bigger, to the point where people remark on it everywhere they go. Alicia only continues to smile, but it's certain that her answer is hidden there somewhere.

As Akari and Aika leave for practice one cold winter morning, Aika has something to tell Akari. The two of them can't practice together anymore... As if that shock weren't enough, Alicia has something important to say as well.

Over the years, the Aria Company has changed. First it was Grandma's Aria Company, then it was Alicia's, and someday, it will be Akari's Aria Company. But that day might come sooner than Akari expected. Will she be ready for the future that lies ahead?

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

The first episode of Aria the Avvenire's story starts with Ai practicing on the gondola with Akari. As they travel through a canal, they meet Aika and Alice. All three have not had much time to meet since becoming Prima undines. Considering even the little time they spend together a "miracle," Akari remembers a certain incident and relates it to Ai.

The second episode's story begins with Ai relating a story to Akari of her experiencing a "miracle" while she was practicing. She saw Cait Sith as she was traveling down an unfamiliar path. When she disembarks from her gondola to follow it, she meets two Single undines from Himeya company and Orange Planet in the middle of practice.

Episode 3 of Aria the Avvenire.