The story follows Daichi Meguru and Mayu, a young boy and a pilot, as they flee their war torn planet and into space. Upon their ship a stowaway android named Zero joins their quest as they travel through Halley's Mirror.

In the year 2059, the earth has been plagued by aliens for several years. In an effort to learn more about these aliens, Dr. Noguchi and his assistants Maki Agata and Takuto Kaneshiro try to revive the professor's experiment, a large Bio-Mechanical alien named Frank. During this process the alien comes to 'life' and the lab is subsequently destroyed leaving Takuto the only survivor and the alien disappearing into the wilderness. While Frank roams the wilderness he meets Hattie, an emotionally distressed young girl whose parents are killed in the first 'close encounter' war. Oddly enough she is able to communicate with Frank and soon after they are taken into custody by a secret agency known only as 'Funeral'. Meanwhile, Takuto wakes up in a hospital bed with his life in shambles, and his face disfigured. Motivated by vengeance and heart break, Takuto accepts an offer from the mysterious 'Mr. X' and receives a new identity as a ranking Funeral officer named Ryu Soma.

In the year 2059, the earth has been plagued by aliens for several years. In an effort to learn more about these aliens, Dr. Noguchi and his assistants Maki Agata and Takuto Kaneshiro try to revive the professor's experiment, a large Bio-Mechanical alien named Frank. During this process the alien comes to 'life' and the lab is subsequently destroyed leaving Takuto the only survivor and the alien disappearing into the wilderness. While Frank roams the wilderness he meets Hattie, an emotionally distressed young girl whose parents are killed in the first 'close encounter' war. Oddly enough she is able to communicate with Frank and soon after they are taken into custody by a secret agency known only as 'Funeral'. Meanwhile, Takuto wakes up in a hospital bed with his life in shambles, and his face disfigured. Motivated by vengeance and heart break, Takuto accepts an offer from the mysterious 'Mr. X' and receives a new identity as a ranking Funeral officer named Ryu Soma.

The pilot Sue Harris goes to a mission on a frozen country, there she suffers an accident on the mountains and her life is in severe danger. Trying to survive on the harsh enviroment, she encounters an alien and engages in combat with it. The two beings will use all means possible to escape of that dead trap alive.

Ren Nanahoshi is a lonely college student who isn't good at communicating with others. He remembers the thrill of watching a live band perform when he was young, and spent most of his days searching for his own identity. One day, while singing karaoke alone, two boys named Yuuto and Wataru discover Ren's singing ability. The two agree: "This is fate. Let's start a band!" Ren promptly runs away, but fate indeed steps in, and their journey begins.

On the planet Aqua lies the watery city of Neo Venezia, a tourist hub in which people travel around in gondolas. Professional gondoliers known as Undines are well-revered as they act as tour guides for the people. Akari Mizunashi is a gondolier in training and also an employee of Aria Company. She gets to meet all sorts of people as she takes them… more On the planet Aqua lies the watery city of Neo Venezia, a tourist hub in which people travel around in gondolas. Professional gondoliers known as Undines are well-revered as they act as tour guides for the people. Akari Mizunashi is a gondolier in training and also an employee of Aria Company. She gets to meet all sorts of people as she takes them on the gondola rides, from friendly mentors to special individuals, all this admidst the beautiful scenic backdrop of the entire city.

Drift peacefully into Neo Venezia, a city on the planet Aqua (formerly known as Mars). By the 24th century, humans have found a way to colonize the previously uninhabitable planet. As futuristic as that sounds, Neo Venezia is still teeming with rustic beauty; gondolas on wide canals and waterways are the main mode of transportation. The city itself is a faithful replication of Manhome's (the planet formerly known as Earth) Venice. To make sure that residents and tourists alike get the most from Neo Venezia's many wonders, companies offering guided tours via gondola were formed, one of which is named Aria Company. This is the workplace of Akari Mizunashi, a free spirited teenager from Manhome who is now a novice Undine (the title given to tour guides). Join Akari as she becomes intimately acquainted with other Undine, tourists, Neo Venezia's residents, and even the city itself, learning many valuable life lessons along the way, such as the wonderful truth that there are such things as manmade miracles.

New Aria work produced for the "Ao no Curtain Call" project to celebrate the 10th anniversary of the broadcast of the first Aria TV series.

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 third and final installment in the Ao no Curtain Call (Blue Curtain Call) trilogy.

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.

In a continuation of the last series, Akari Mizunashi continues her job as a gondolier along with her friends from the other two rival companies, Aika and Alice. As they continue their training to become Undines, they continue to meet new people and partake on mysterious adventures, all in the quiet, scenic, and peaceful city of Neo Venezia.